[packages/kernel/LINUX_4_9] Update RT patch to 4.9.27-rt18
jajcus
jajcus at pld-linux.org
Thu May 18 16:24:58 CEST 2017
commit 7c18450abfab466e4ad31cd3724bfc5ac985ec4c
Author: Jacek Konieczny <j.konieczny at eggsoft.pl>
Date: Thu May 18 16:24:38 2017 +0200
Update RT patch to 4.9.27-rt18
kernel-rt.patch | 1234 ++++++++++++++++++++++++++++++++++++++++++-------------
kernel.spec | 2 +-
2 files changed, 958 insertions(+), 278 deletions(-)
---
diff --git a/kernel.spec b/kernel.spec
index 7675b116..cf54d631 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -213,7 +213,7 @@ Patch146: kernel-aufs4+vserver.patch
Patch250: kernel-fix_256colors_menuconfig.patch
# https://rt.wiki.kernel.org/
-# https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/patch-4.9.20-rt16.patch.xz
+# https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/patch-4.9.27-rt18.patch.xz
Patch500: kernel-rt.patch
Patch2000: kernel-small_fixes.patch
diff --git a/kernel-rt.patch b/kernel-rt.patch
index be826223..69fb3ec7 100644
--- a/kernel-rt.patch
+++ b/kernel-rt.patch
@@ -214,6 +214,34 @@ index 000000000000..6f2aeabf7faa
+is provided.
+
+These data are also reset when the wakeup histogram is reset.
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 63cefa62324c..be0ea1e5c4cc 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -5196,6 +5196,23 @@ F: fs/fuse/
+ F: include/uapi/linux/fuse.h
+ F: Documentation/filesystems/fuse.txt
+
++FUTEX SUBSYSTEM
++M: Thomas Gleixner <tglx at linutronix.de>
++M: Ingo Molnar <mingo at redhat.com>
++R: Peter Zijlstra <peterz at infradead.org>
++R: Darren Hart <dvhart at infradead.org>
++L: linux-kernel at vger.kernel.org
++T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
++S: Maintained
++F: kernel/futex.c
++F: kernel/futex_compat.c
++F: include/asm-generic/futex.h
++F: include/linux/futex.h
++F: include/uapi/linux/futex.h
++F: tools/testing/selftests/futex/
++F: tools/perf/bench/futex*
++F: Documentation/*futex*
++
+ FUTURE DOMAIN TMC-16x0 SCSI DRIVER (16-bit)
+ M: Rik Faith <faith at cs.unc.edu>
+ L: linux-scsi at vger.kernel.org
diff --git a/arch/Kconfig b/arch/Kconfig
index 659bdd079277..099fc0f5155e 100644
--- a/arch/Kconfig
@@ -1215,7 +1243,7 @@ index e9ea5a6bd449..6c500ad63c6a 100644
#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
-index 4a2f0f0fef32..6bf2bc17c400 100644
+index c58ddf8c4062..a8f2f7c1fe12 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -38,6 +38,7 @@ int main(void)
@@ -1272,10 +1300,10 @@ index 404dd67080b9..639dc6d12e72 100644
} else {
local_irq_enable();
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
-index b3c5bde43d34..8122bf058de0 100644
+index 5a4f2eb9d0d5..867eca2e7210 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2514,7 +2514,7 @@ config MIPS_ASID_BITS_VARIABLE
+@@ -2515,7 +2515,7 @@ config MIPS_ASID_BITS_VARIABLE
#
config HIGHMEM
bool "High Memory Support"
@@ -1433,7 +1461,7 @@ index 3841d749a430..6dbaeff192b9 100644
andi. r0,r9,_TIF_USER_WORK_MASK
beq restore_user
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
-index 6432d4bf08c8..5509a26f1070 100644
+index 767ef6d68c9e..2cb4d5552319 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -656,7 +656,7 @@ _GLOBAL(ret_from_except_lite)
@@ -1517,7 +1545,7 @@ index 030d72df5dd5..b471a709e100 100644
/*
* void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp);
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
-index 4f178671f230..39e7d84a3492 100644
+index 4cefe6888b18..cb2ee4be999a 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -31,6 +31,7 @@
@@ -2301,7 +2329,7 @@ index c62e015b126c..0cc71257fca6 100644
+ DEFINE(_PREEMPT_ENABLED, PREEMPT_ENABLED);
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
-index a7fdf453d895..e3a0e969a66e 100644
+index 22cda29d654e..57c85e3af092 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -41,6 +41,8 @@
@@ -2313,7 +2341,7 @@ index a7fdf453d895..e3a0e969a66e 100644
#include <linux/jump_label.h>
#include <asm/processor.h>
-@@ -1317,7 +1319,7 @@ void mce_log_therm_throt_event(__u64 status)
+@@ -1307,7 +1309,7 @@ void mce_log_therm_throt_event(__u64 status)
static unsigned long check_interval = INITIAL_CHECK_INTERVAL;
static DEFINE_PER_CPU(unsigned long, mce_next_interval); /* in jiffies */
@@ -2322,7 +2350,7 @@ index a7fdf453d895..e3a0e969a66e 100644
static unsigned long mce_adjust_timer_default(unsigned long interval)
{
-@@ -1326,32 +1328,18 @@ static unsigned long mce_adjust_timer_default(unsigned long interval)
+@@ -1316,32 +1318,18 @@ static unsigned long mce_adjust_timer_default(unsigned long interval)
static unsigned long (*mce_adjust_timer)(unsigned long interval) = mce_adjust_timer_default;
@@ -2361,7 +2389,7 @@ index a7fdf453d895..e3a0e969a66e 100644
iv = __this_cpu_read(mce_next_interval);
if (mce_available(this_cpu_ptr(&cpu_info))) {
-@@ -1374,7 +1362,7 @@ static void mce_timer_fn(unsigned long data)
+@@ -1364,7 +1352,7 @@ static void mce_timer_fn(unsigned long data)
done:
__this_cpu_write(mce_next_interval, iv);
@@ -2370,7 +2398,7 @@ index a7fdf453d895..e3a0e969a66e 100644
}
/*
-@@ -1382,7 +1370,7 @@ static void mce_timer_fn(unsigned long data)
+@@ -1372,7 +1360,7 @@ static void mce_timer_fn(unsigned long data)
*/
void mce_timer_kick(unsigned long interval)
{
@@ -2379,7 +2407,7 @@ index a7fdf453d895..e3a0e969a66e 100644
unsigned long iv = __this_cpu_read(mce_next_interval);
__restart_timer(t, interval);
-@@ -1397,7 +1385,7 @@ static void mce_timer_delete_all(void)
+@@ -1387,7 +1375,7 @@ static void mce_timer_delete_all(void)
int cpu;
for_each_online_cpu(cpu)
@@ -2388,7 +2416,7 @@ index a7fdf453d895..e3a0e969a66e 100644
}
static void mce_do_trigger(struct work_struct *work)
-@@ -1407,6 +1395,56 @@ static void mce_do_trigger(struct work_struct *work)
+@@ -1397,6 +1385,56 @@ static void mce_do_trigger(struct work_struct *work)
static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
@@ -2445,7 +2473,7 @@ index a7fdf453d895..e3a0e969a66e 100644
/*
* Notify the user(s) about new machine check events.
* Can be called from interrupt context, but not from machine check/NMI
-@@ -1414,19 +1452,8 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
+@@ -1404,19 +1442,8 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
*/
int mce_notify_irq(void)
{
@@ -2466,7 +2494,7 @@ index a7fdf453d895..e3a0e969a66e 100644
return 1;
}
return 0;
-@@ -1732,7 +1759,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
+@@ -1722,7 +1749,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
}
}
@@ -2475,7 +2503,7 @@ index a7fdf453d895..e3a0e969a66e 100644
{
unsigned long iv = check_interval * HZ;
-@@ -1741,16 +1768,17 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t)
+@@ -1731,16 +1758,17 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t)
per_cpu(mce_next_interval, cpu) = iv;
@@ -2497,7 +2525,7 @@ index a7fdf453d895..e3a0e969a66e 100644
mce_start_timer(cpu, t);
}
-@@ -2475,6 +2503,8 @@ static void mce_disable_cpu(void *h)
+@@ -2465,6 +2493,8 @@ static void mce_disable_cpu(void *h)
if (!mce_available(raw_cpu_ptr(&cpu_info)))
return;
@@ -2506,7 +2534,7 @@ index a7fdf453d895..e3a0e969a66e 100644
if (!(action & CPU_TASKS_FROZEN))
cmci_clear();
-@@ -2497,6 +2527,7 @@ static void mce_reenable_cpu(void *h)
+@@ -2487,6 +2517,7 @@ static void mce_reenable_cpu(void *h)
if (b->init)
wrmsrl(msr_ops.ctl(i), b->ctl);
}
@@ -2514,7 +2542,7 @@ index a7fdf453d895..e3a0e969a66e 100644
}
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-@@ -2504,7 +2535,6 @@ static int
+@@ -2494,7 +2525,6 @@ static int
mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
@@ -2522,7 +2550,7 @@ index a7fdf453d895..e3a0e969a66e 100644
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
-@@ -2524,11 +2554,9 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
+@@ -2514,11 +2544,9 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
break;
case CPU_DOWN_PREPARE:
smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
@@ -2534,7 +2562,7 @@ index a7fdf453d895..e3a0e969a66e 100644
break;
}
-@@ -2567,6 +2595,10 @@ static __init int mcheck_init_device(void)
+@@ -2557,6 +2585,10 @@ static __init int mcheck_init_device(void)
goto err_out;
}
@@ -2931,7 +2959,7 @@ index b333fc45f9ec..8b85916e6986 100644
/*
diff --git a/block/blk-core.c b/block/blk-core.c
-index 14d7c0740dc0..dfd905bea77c 100644
+index d1f2801ce836..6f945bb0fa1a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -125,6 +125,9 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
@@ -2980,7 +3008,7 @@ index 14d7c0740dc0..dfd905bea77c 100644
/*
* Init percpu_ref in atomic mode so that it's faster to shutdown.
-@@ -3177,7 +3180,7 @@ static void queue_unplugged(struct request_queue *q, unsigned int depth,
+@@ -3200,7 +3203,7 @@ static void queue_unplugged(struct request_queue *q, unsigned int depth,
blk_run_queue_async(q);
else
__blk_run_queue(q);
@@ -2989,7 +3017,7 @@ index 14d7c0740dc0..dfd905bea77c 100644
}
static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule)
-@@ -3225,7 +3228,6 @@ EXPORT_SYMBOL(blk_check_plugged);
+@@ -3248,7 +3251,6 @@ EXPORT_SYMBOL(blk_check_plugged);
void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
{
struct request_queue *q;
@@ -2997,7 +3025,7 @@ index 14d7c0740dc0..dfd905bea77c 100644
struct request *rq;
LIST_HEAD(list);
unsigned int depth;
-@@ -3245,11 +3247,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
+@@ -3268,11 +3270,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
q = NULL;
depth = 0;
@@ -3009,7 +3037,7 @@ index 14d7c0740dc0..dfd905bea77c 100644
while (!list_empty(&list)) {
rq = list_entry_rq(list.next);
list_del_init(&rq->queuelist);
-@@ -3262,7 +3259,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
+@@ -3285,7 +3282,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
queue_unplugged(q, depth, from_schedule);
q = rq->q;
depth = 0;
@@ -3018,7 +3046,7 @@ index 14d7c0740dc0..dfd905bea77c 100644
}
/*
-@@ -3289,8 +3286,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
+@@ -3312,8 +3309,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
*/
if (q)
queue_unplugged(q, depth, from_schedule);
@@ -3058,7 +3086,7 @@ index 381cb50a673c..dc8785233d94 100644
}
}
diff --git a/block/blk-mq.c b/block/blk-mq.c
-index ee54ad01f7ac..1a428fe7bbe1 100644
+index 7b597ec4e9c5..48c9652a701c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -72,7 +72,7 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start);
@@ -3479,7 +3507,7 @@ index 478cac2ed465..f7a6efdc3285 100644
/* dynamic per-device compression frontend */
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
-index d2ef51ca9cf4..05e749736560 100644
+index c9914d653968..2038d138f286 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -528,6 +528,8 @@ static struct zram_meta *zram_meta_alloc(char *pool_name, u64 disksize)
@@ -3505,14 +3533,14 @@ index d2ef51ca9cf4..05e749736560 100644
if (!handle || zram_test_flag(meta, index, ZRAM_ZERO)) {
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_unlock_table(&meta->table[index]);
- clear_page(mem);
+ memset(mem, 0, PAGE_SIZE);
return 0;
}
+ zstrm = zcomp_stream_get(zram->comp);
cmem = zs_map_object(meta->mem_pool, handle, ZS_MM_RO);
if (size == PAGE_SIZE) {
- copy_page(mem, cmem);
+ memcpy(mem, cmem, PAGE_SIZE);
} else {
- struct zcomp_strm *zstrm = zcomp_stream_get(zram->comp);
-
@@ -3654,10 +3682,18 @@ index 74fcf10da374..fd4020c99b9e 100644
+
#endif
diff --git a/drivers/char/random.c b/drivers/char/random.c
-index d6876d506220..0c60b1e54579 100644
+index 08d1dd58c0d2..25ee319dc8e3 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
-@@ -1028,8 +1028,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
+@@ -262,6 +262,7 @@
+ #include <linux/syscalls.h>
+ #include <linux/completion.h>
+ #include <linux/uuid.h>
++#include <linux/locallock.h>
+ #include <crypto/chacha20.h>
+
+ #include <asm/processor.h>
+@@ -1028,8 +1029,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
} sample;
long delta, delta2, delta3;
@@ -3666,7 +3702,7 @@ index d6876d506220..0c60b1e54579 100644
sample.jiffies = jiffies;
sample.cycles = random_get_entropy();
sample.num = num;
-@@ -1070,7 +1068,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
+@@ -1070,7 +1069,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
*/
credit_entropy_bits(r, min_t(int, fls(delta>>1), 11));
}
@@ -3674,7 +3710,7 @@ index d6876d506220..0c60b1e54579 100644
}
void add_input_randomness(unsigned int type, unsigned int code,
-@@ -1123,28 +1120,27 @@ static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
+@@ -1123,28 +1121,27 @@ static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
return *(ptr + f->reg_idx++);
}
@@ -3708,6 +3744,55 @@ index d6876d506220..0c60b1e54579 100644
fast_mix(fast_pool);
add_interrupt_bench(cycles);
+@@ -2056,6 +2053,7 @@ struct batched_entropy {
+ * goal of being quite fast and not depleting entropy.
+ */
+ static DEFINE_PER_CPU(struct batched_entropy, batched_entropy_long);
++static DEFINE_LOCAL_IRQ_LOCK(batched_entropy_long_lock);
+ unsigned long get_random_long(void)
+ {
+ unsigned long ret;
+@@ -2064,13 +2062,13 @@ unsigned long get_random_long(void)
+ if (arch_get_random_long(&ret))
+ return ret;
+
+- batch = &get_cpu_var(batched_entropy_long);
++ batch = &get_locked_var(batched_entropy_long_lock, batched_entropy_long);
+ if (batch->position % ARRAY_SIZE(batch->entropy_long) == 0) {
+ extract_crng((u8 *)batch->entropy_long);
+ batch->position = 0;
+ }
+ ret = batch->entropy_long[batch->position++];
+- put_cpu_var(batched_entropy_long);
++ put_locked_var(batched_entropy_long_lock, batched_entropy_long);
+ return ret;
+ }
+ EXPORT_SYMBOL(get_random_long);
+@@ -2082,6 +2080,8 @@ unsigned int get_random_int(void)
+ }
+ #else
+ static DEFINE_PER_CPU(struct batched_entropy, batched_entropy_int);
++static DEFINE_LOCAL_IRQ_LOCK(batched_entropy_int_lock);
++
+ unsigned int get_random_int(void)
+ {
+ unsigned int ret;
+@@ -2090,13 +2090,13 @@ unsigned int get_random_int(void)
+ if (arch_get_random_int(&ret))
+ return ret;
+
+- batch = &get_cpu_var(batched_entropy_int);
++ batch = &get_locked_var(batched_entropy_int_lock, batched_entropy_int);
+ if (batch->position % ARRAY_SIZE(batch->entropy_int) == 0) {
+ extract_crng((u8 *)batch->entropy_int);
+ batch->position = 0;
+ }
+ ret = batch->entropy_int[batch->position++];
+- put_cpu_var(batched_entropy_int);
++ put_locked_var(batched_entropy_int_lock, batched_entropy_int);
+ return ret;
+ }
+ #endif
diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
index 4da2af9694a2..5b6f57f500b8 100644
--- a/drivers/clocksource/tcb_clksrc.c
@@ -4059,10 +4144,10 @@ index adbd1de1cea5..1fac5074f2cf 100644
This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
Support for K10 and newer processors is now in acpi-cpufreq.
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
-index 0c400f852a76..97d5f6193751 100644
+index 2117f172d7a2..96c15501b0c8 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
-@@ -1537,7 +1537,9 @@ execbuf_submit(struct i915_execbuffer_params *params,
+@@ -1489,7 +1489,9 @@ execbuf_submit(struct i915_execbuffer_params *params,
if (ret)
return ret;
@@ -4073,7 +4158,7 @@ index 0c400f852a76..97d5f6193751 100644
i915_gem_execbuffer_move_to_active(vmas, params->request);
diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c
-index 1c237d02f30b..9e9b4404c0d7 100644
+index 755d78832a66..97fb03dc4971 100644
--- a/drivers/gpu/drm/i915/i915_gem_shrinker.c
+++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c
@@ -40,7 +40,7 @@ static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task)
@@ -4086,7 +4171,7 @@ index 1c237d02f30b..9e9b4404c0d7 100644
#else
/* Since UP may be pre-empted, we cannot assume that we own the lock */
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
-index 3fc286cd1157..252a1117b103 100644
+index 02908e37c228..05c0480576e1 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -812,6 +812,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
@@ -4106,10 +4191,10 @@ index 3fc286cd1157..252a1117b103 100644
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
-index b9be8a6141d8..3162feddabe8 100644
+index 5dc6082639db..c32458fb3be2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
-@@ -12141,7 +12141,7 @@ void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe)
+@@ -12131,7 +12131,7 @@ void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe)
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_flip_work *work;
@@ -5119,7 +5204,7 @@ index 16ca31ad5ec0..c3987347e762 100644
/* peek cache of free slot */
if (pool->left != FC_XID_UNKNOWN) {
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
-index 763f012fdeca..d0f61b595470 100644
+index 87f5e694dbed..23c0a50fb6aa 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -190,7 +190,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
@@ -5396,10 +5481,10 @@ index a2a529994ba5..0ee7c4c518df 100644
static int __init
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
-index 479e223f9cff..3418a54b4131 100644
+index f029aad67183..87c026876640 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
-@@ -1761,9 +1761,9 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
+@@ -1764,9 +1764,9 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
* and no one may trigger the above deadlock situation when
* running complete() in tasklet.
*/
@@ -6093,10 +6178,10 @@ index 1452177c822d..f43b01d54c59 100644
};
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
-index 1536aeb0abab..0a8bc7eab083 100644
+index 4e894d301c88..3300a4b5c87c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
-@@ -2698,7 +2698,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
+@@ -2695,7 +2695,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
unsigned int seq;
int ret;
@@ -6105,7 +6190,7 @@ index 1536aeb0abab..0a8bc7eab083 100644
ret = _nfs4_proc_open(opendata);
if (ret != 0)
-@@ -2736,7 +2736,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
+@@ -2733,7 +2733,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
if (d_inode(dentry) == state->inode) {
nfs_inode_attach_open_context(ctx);
@@ -6343,10 +6428,10 @@ index d4e37acd4821..000cea46434a 100644
if (IS_ERR(child))
return false;
diff --git a/fs/timerfd.c b/fs/timerfd.c
-index 9ae4abb4110b..8644b67c48fd 100644
+index ab8dd1538381..5580853f57dd 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
-@@ -460,7 +460,10 @@ static int do_timerfd_settime(int ufd, int flags,
+@@ -471,7 +471,10 @@ static int do_timerfd_settime(int ufd, int flags,
break;
}
spin_unlock_irq(&ctx->wqh.lock);
@@ -6890,7 +6975,7 @@ index 083d61e92706..5899796f50cb 100644
/**
* idr_find - return pointer for given id
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
-index 325f649d77ff..8af70bcc799b 100644
+index 325f649d77ff..a56e263f5005 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -150,6 +150,12 @@ extern struct task_group root_task_group;
@@ -6906,7 +6991,15 @@ index 325f649d77ff..8af70bcc799b 100644
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
# define INIT_VTIME(tsk) \
.vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \
-@@ -250,6 +256,7 @@ extern struct task_group root_task_group;
+@@ -164,6 +170,7 @@ extern struct task_group root_task_group;
+ #ifdef CONFIG_RT_MUTEXES
+ # define INIT_RT_MUTEXES(tsk) \
+ .pi_waiters = RB_ROOT, \
++ .pi_top_task = NULL, \
+ .pi_waiters_leftmost = NULL,
+ #else
+ # define INIT_RT_MUTEXES(tsk)
+@@ -250,6 +257,7 @@ extern struct task_group root_task_group;
.cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
.timer_slack_ns = 50000, /* 50 usec default slack */ \
@@ -8452,7 +8545,7 @@ index af3581b8a451..277295039c8f 100644
* struct radix_tree_iter - radix tree iterator state
*
diff --git a/include/linux/random.h b/include/linux/random.h
-index 7bd2403e4fef..b2df7148a42b 100644
+index 16ab429735a7..9d0fecb5b6c2 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -31,7 +31,7 @@ static inline void add_latent_entropy(void) {}
@@ -9105,7 +9198,7 @@ index 000000000000..2ffbf093ae92
+
+#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
-index 75d9a57e212e..8cb7df0f56e3 100644
+index f425eb3318ab..e010fb4d640d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -26,6 +26,7 @@ struct sched_param {
@@ -9181,7 +9274,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
int nr_cpus_allowed;
cpumask_t cpus_allowed;
-@@ -1654,6 +1674,9 @@ struct task_struct {
+@@ -1658,6 +1678,9 @@ struct task_struct {
struct task_cputime cputime_expires;
struct list_head cpu_timers[3];
@@ -9191,7 +9284,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
/* process credentials */
const struct cred __rcu *ptracer_cred; /* Tracer's credentials at attach */
-@@ -1685,10 +1708,15 @@ struct task_struct {
+@@ -1689,10 +1712,15 @@ struct task_struct {
/* signal handlers */
struct signal_struct *signal;
struct sighand_struct *sighand;
@@ -9207,7 +9300,16 @@ index 75d9a57e212e..8cb7df0f56e3 100644
unsigned long sas_ss_sp;
size_t sas_ss_size;
-@@ -1917,6 +1945,12 @@ struct task_struct {
+@@ -1723,6 +1751,8 @@ struct task_struct {
+ /* PI waiters blocked on a rt_mutex held by this task */
+ struct rb_root pi_waiters;
+ struct rb_node *pi_waiters_leftmost;
++ /* Updated under owner's pi_lock and rq lock */
++ struct task_struct *pi_top_task;
+ /* Deadlock detection and priority inheritance handling */
+ struct rt_mutex_waiter *pi_blocked_on;
+ #endif
+@@ -1921,6 +1951,12 @@ struct task_struct {
/* bitmask and counter of trace recursion */
unsigned long trace_recursion;
#endif /* CONFIG_TRACING */
@@ -9220,7 +9322,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
#ifdef CONFIG_KCOV
/* Coverage collection mode enabled for this task (0 if disabled). */
enum kcov_mode kcov_mode;
-@@ -1942,9 +1976,23 @@ struct task_struct {
+@@ -1946,9 +1982,23 @@ struct task_struct {
unsigned int sequential_io;
unsigned int sequential_io_avg;
#endif
@@ -9244,7 +9346,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
int pagefault_disabled;
#ifdef CONFIG_MMU
struct task_struct *oom_reaper_list;
-@@ -1984,14 +2032,6 @@ static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
+@@ -1988,14 +2038,6 @@ static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
}
#endif
@@ -9259,7 +9361,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
#define TNF_MIGRATED 0x01
#define TNF_NO_GROUP 0x02
#define TNF_SHARED 0x04
-@@ -2207,6 +2247,15 @@ extern struct pid *cad_pid;
+@@ -2211,6 +2253,15 @@ extern struct pid *cad_pid;
extern void free_task(struct task_struct *tsk);
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
@@ -9275,7 +9377,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
extern void __put_task_struct(struct task_struct *t);
static inline void put_task_struct(struct task_struct *t)
-@@ -2214,6 +2263,7 @@ static inline void put_task_struct(struct task_struct *t)
+@@ -2218,6 +2269,7 @@ static inline void put_task_struct(struct task_struct *t)
if (atomic_dec_and_test(&t->usage))
__put_task_struct(t);
}
@@ -9283,7 +9385,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
struct task_struct *task_rcu_dereference(struct task_struct **ptask);
struct task_struct *try_get_task_struct(struct task_struct **ptask);
-@@ -2255,6 +2305,7 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut,
+@@ -2259,6 +2311,7 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut,
/*
* Per process flags
*/
@@ -9291,7 +9393,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
#define PF_EXITING 0x00000004 /* getting shut down */
#define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */
#define PF_VCPU 0x00000010 /* I'm a virtual CPU */
-@@ -2423,6 +2474,10 @@ extern void do_set_cpus_allowed(struct task_struct *p,
+@@ -2427,6 +2480,10 @@ extern void do_set_cpus_allowed(struct task_struct *p,
extern int set_cpus_allowed_ptr(struct task_struct *p,
const struct cpumask *new_mask);
@@ -9302,7 +9404,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
#else
static inline void do_set_cpus_allowed(struct task_struct *p,
const struct cpumask *new_mask)
-@@ -2435,6 +2490,9 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p,
+@@ -2439,6 +2496,9 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p,
return -EINVAL;
return 0;
}
@@ -9312,7 +9414,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
#endif
#ifdef CONFIG_NO_HZ_COMMON
-@@ -2673,6 +2731,7 @@ extern void xtime_update(unsigned long ticks);
+@@ -2677,6 +2737,7 @@ extern void xtime_update(unsigned long ticks);
extern int wake_up_state(struct task_struct *tsk, unsigned int state);
extern int wake_up_process(struct task_struct *tsk);
@@ -9320,7 +9422,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
extern void wake_up_new_task(struct task_struct *tsk);
#ifdef CONFIG_SMP
extern void kick_process(struct task_struct *tsk);
-@@ -2881,6 +2940,17 @@ static inline void mmdrop(struct mm_struct *mm)
+@@ -2885,6 +2946,17 @@ static inline void mmdrop(struct mm_struct *mm)
__mmdrop(mm);
}
@@ -9338,7 +9440,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
static inline void mmdrop_async_fn(struct work_struct *work)
{
struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
-@@ -3273,6 +3343,43 @@ static inline int test_tsk_need_resched(struct task_struct *tsk)
+@@ -3277,6 +3349,43 @@ static inline int test_tsk_need_resched(struct task_struct *tsk)
return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
}
@@ -9382,7 +9484,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
static inline int restart_syscall(void)
{
set_tsk_thread_flag(current, TIF_SIGPENDING);
-@@ -3304,6 +3411,51 @@ static inline int signal_pending_state(long state, struct task_struct *p)
+@@ -3308,6 +3417,51 @@ static inline int signal_pending_state(long state, struct task_struct *p)
return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
}
@@ -9434,7 +9536,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
/*
* cond_resched() and cond_resched_lock(): latency reduction via
* explicit rescheduling in places that are safe. The return
-@@ -3329,12 +3481,16 @@ extern int __cond_resched_lock(spinlock_t *lock);
+@@ -3333,12 +3487,16 @@ extern int __cond_resched_lock(spinlock_t *lock);
__cond_resched_lock(lock); \
})
@@ -9451,7 +9553,7 @@ index 75d9a57e212e..8cb7df0f56e3 100644
static inline void cond_resched_rcu(void)
{
-@@ -3509,6 +3665,31 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
+@@ -3513,6 +3671,31 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
#endif /* CONFIG_SMP */
@@ -9483,6 +9585,46 @@ index 75d9a57e212e..8cb7df0f56e3 100644
extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
+diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h
+index a30b172df6e1..db3e91f2bc03 100644
+--- a/include/linux/sched/rt.h
++++ b/include/linux/sched/rt.h
+@@ -16,27 +16,20 @@ static inline int rt_task(struct task_struct *p)
+ }
+
+ #ifdef CONFIG_RT_MUTEXES
+-extern int rt_mutex_getprio(struct task_struct *p);
+-extern void rt_mutex_setprio(struct task_struct *p, int prio);
+-extern int rt_mutex_get_effective_prio(struct task_struct *task, int newprio);
+-extern struct task_struct *rt_mutex_get_top_task(struct task_struct *task);
++/*
++ * Must hold either p->pi_lock or task_rq(p)->lock.
++ */
++static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p)
++{
++ return p->pi_top_task;
++}
++extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task);
+ extern void rt_mutex_adjust_pi(struct task_struct *p);
+ static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
+ {
+ return tsk->pi_blocked_on != NULL;
+ }
+ #else
+-static inline int rt_mutex_getprio(struct task_struct *p)
+-{
+- return p->normal_prio;
+-}
+-
+-static inline int rt_mutex_get_effective_prio(struct task_struct *task,
+- int newprio)
+-{
+- return newprio;
+-}
+-
+ static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
+ {
+ return NULL;
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index ead97654c4e9..3d7223ffdd3b 100644
--- a/include/linux/seqlock.h
@@ -10696,6 +10838,76 @@ index 000000000000..d3f2fbd560b1
+}
+
+#endif /* _LATENCY_HIST_H */
+diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
+index 9b90c57517a9..516ae88cddf4 100644
+--- a/include/trace/events/sched.h
++++ b/include/trace/events/sched.h
+@@ -70,7 +70,7 @@ DECLARE_EVENT_CLASS(sched_wakeup_template,
+ TP_fast_assign(
+ memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+ __entry->pid = p->pid;
+- __entry->prio = p->prio;
++ __entry->prio = p->prio; /* XXX SCHED_DEADLINE */
+ __entry->success = 1; /* rudiment, kill when possible */
+ __entry->target_cpu = task_cpu(p);
+ ),
+@@ -147,6 +147,7 @@ TRACE_EVENT(sched_switch,
+ memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
+ __entry->next_pid = next->pid;
+ __entry->next_prio = next->prio;
++ /* XXX SCHED_DEADLINE */
+ ),
+
+ TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==> next_comm=%s next_pid=%d next_prio=%d",
+@@ -181,7 +182,7 @@ TRACE_EVENT(sched_migrate_task,
+ TP_fast_assign(
+ memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+ __entry->pid = p->pid;
+- __entry->prio = p->prio;
++ __entry->prio = p->prio; /* XXX SCHED_DEADLINE */
+ __entry->orig_cpu = task_cpu(p);
+ __entry->dest_cpu = dest_cpu;
+ ),
+@@ -206,7 +207,7 @@ DECLARE_EVENT_CLASS(sched_process_template,
+ TP_fast_assign(
+ memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+ __entry->pid = p->pid;
+- __entry->prio = p->prio;
++ __entry->prio = p->prio; /* XXX SCHED_DEADLINE */
+ ),
+
+ TP_printk("comm=%s pid=%d prio=%d",
+@@ -253,7 +254,7 @@ TRACE_EVENT(sched_process_wait,
+ TP_fast_assign(
+ memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+ __entry->pid = pid_nr(pid);
+- __entry->prio = current->prio;
++ __entry->prio = current->prio; /* XXX SCHED_DEADLINE */
+ ),
+
+ TP_printk("comm=%s pid=%d prio=%d",
+@@ -413,9 +414,9 @@ DEFINE_EVENT(sched_stat_runtime, sched_stat_runtime,
+ */
+ TRACE_EVENT(sched_pi_setprio,
+
+- TP_PROTO(struct task_struct *tsk, int newprio),
++ TP_PROTO(struct task_struct *tsk, struct task_struct *pi_task),
+
+- TP_ARGS(tsk, newprio),
++ TP_ARGS(tsk, pi_task),
+
+ TP_STRUCT__entry(
+ __array( char, comm, TASK_COMM_LEN )
+@@ -428,7 +429,8 @@ TRACE_EVENT(sched_pi_setprio,
+ memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
+ __entry->pid = tsk->pid;
+ __entry->oldprio = tsk->prio;
+- __entry->newprio = newprio;
++ __entry->newprio = pi_task ? pi_task->prio : tsk->prio;
++ /* XXX SCHED_DEADLINE bits missing */
+ ),
+
+ TP_printk("comm=%s pid=%d oldprio=%d newprio=%d",
diff --git a/init/Kconfig b/init/Kconfig
index 34407f15e6d3..2ce33a32e65d 100644
--- a/init/Kconfig
@@ -10791,7 +11003,7 @@ index c4fb45525d08..821190dfaa75 100644
- "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)"
+ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CONFIG_PREEMPT_RT_FULL)" "$(CC) $(KBUILD_CFLAGS)"
diff --git a/init/main.c b/init/main.c
-index 2858be732f6d..3c97c3c91d88 100644
+index ae3996ae9bac..6470deef01c9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -507,6 +507,7 @@ asmlinkage __visible void __init start_kernel(void)
@@ -10919,10 +11131,10 @@ index 3f9c97419f02..11dbe26a8279 100644
config PREEMPT_COUNT
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
-index 4e2f3de0e40b..6401eb5fe140 100644
+index a3d2aad2443f..bb6b252648ff 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
-@@ -5040,10 +5040,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head)
+@@ -5041,10 +5041,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head)
queue_work(cgroup_destroy_wq, &css->destroy_work);
}
@@ -10935,7 +11147,7 @@ index 4e2f3de0e40b..6401eb5fe140 100644
struct cgroup_subsys *ss = css->ss;
struct cgroup *cgrp = css->cgroup;
-@@ -5086,8 +5086,8 @@ static void css_release(struct percpu_ref *ref)
+@@ -5087,8 +5087,8 @@ static void css_release(struct percpu_ref *ref)
struct cgroup_subsys_state *css =
container_of(ref, struct cgroup_subsys_state, refcnt);
@@ -10946,7 +11158,7 @@ index 4e2f3de0e40b..6401eb5fe140 100644
}
static void init_and_link_css(struct cgroup_subsys_state *css,
-@@ -5739,6 +5739,7 @@ static int __init cgroup_wq_init(void)
+@@ -5740,6 +5740,7 @@ static int __init cgroup_wq_init(void)
*/
cgroup_destroy_wq = alloc_workqueue("cgroup_destroy", 0, 1);
BUG_ON(!cgroup_destroy_wq);
@@ -10955,7 +11167,7 @@ index 4e2f3de0e40b..6401eb5fe140 100644
/*
* Used to destroy pidlists and separate to serve as flush domain.
diff --git a/kernel/cpu.c b/kernel/cpu.c
-index 217fd2e7f435..c23676e58dfd 100644
+index 99c6c568bc55..f1c64e563970 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -239,6 +239,289 @@ static struct {
@@ -11333,7 +11545,7 @@ index 217fd2e7f435..c23676e58dfd 100644
#endif /* CONFIG_SMP */
/* Boot processor state steps */
-@@ -1923,6 +2247,10 @@ void __init boot_cpu_init(void)
+@@ -1924,6 +2248,10 @@ void __init boot_cpu_init(void)
set_cpu_active(cpu, true);
set_cpu_present(cpu, true);
set_cpu_possible(cpu, true);
@@ -11657,7 +11869,7 @@ index 3076f3089919..fb2ebcf3ca7c 100644
spin_unlock(&sighand->siglock);
diff --git a/kernel/fork.c b/kernel/fork.c
-index ba8a01564985..47784f8aed37 100644
+index ba8a01564985..416d91e4af97 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -76,6 +76,7 @@
@@ -11733,7 +11945,15 @@ index ba8a01564985..47784f8aed37 100644
static inline void __mmput(struct mm_struct *mm)
{
VM_BUG_ON(atomic_read(&mm->mm_users));
-@@ -1426,6 +1462,9 @@ static void rt_mutex_init_task(struct task_struct *p)
+@@ -1417,6 +1453,7 @@ static void rt_mutex_init_task(struct task_struct *p)
+ #ifdef CONFIG_RT_MUTEXES
+ p->pi_waiters = RB_ROOT;
+ p->pi_waiters_leftmost = NULL;
++ p->pi_top_task = NULL;
+ p->pi_blocked_on = NULL;
+ #endif
+ }
+@@ -1426,6 +1463,9 @@ static void rt_mutex_init_task(struct task_struct *p)
*/
static void posix_cpu_timers_init(struct task_struct *tsk)
{
@@ -11743,7 +11963,7 @@ index ba8a01564985..47784f8aed37 100644
tsk->cputime_expires.prof_exp = 0;
tsk->cputime_expires.virt_exp = 0;
tsk->cputime_expires.sched_exp = 0;
-@@ -1552,6 +1591,7 @@ static __latent_entropy struct task_struct *copy_process(
+@@ -1552,6 +1592,7 @@ static __latent_entropy struct task_struct *copy_process(
spin_lock_init(&p->alloc_lock);
init_sigpending(&p->pending);
@@ -11752,7 +11972,7 @@ index ba8a01564985..47784f8aed37 100644
p->utime = p->stime = p->gtime = 0;
p->utimescaled = p->stimescaled = 0;
diff --git a/kernel/futex.c b/kernel/futex.c
-index 4c6b6e697b73..a01d203939cb 100644
+index 4c6b6e697b73..d9bab63efccb 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -800,7 +800,7 @@ static int refill_pi_state_cache(void)
@@ -11850,7 +12070,7 @@ index 4c6b6e697b73..a01d203939cb 100644
*/
/*
-@@ -978,10 +1020,12 @@ void exit_pi_state_list(struct task_struct *curr)
+@@ -978,10 +1020,13 @@ void exit_pi_state_list(struct task_struct *curr)
* the pi_state against the user space value. If correct, attach to
* it.
*/
@@ -11860,11 +12080,12 @@ index 4c6b6e697b73..a01d203939cb 100644
struct futex_pi_state **ps)
{
pid_t pid = uval & FUTEX_TID_MASK;
-+ int ret, uval2;
++ u32 uval2;
++ int ret;
/*
* Userspace might have messed up non-PI and PI futexes [3]
-@@ -989,9 +1033,39 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
+@@ -989,9 +1034,39 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
if (unlikely(!pi_state))
return -EINVAL;
@@ -11904,7 +12125,7 @@ index 4c6b6e697b73..a01d203939cb 100644
* Handle the owner died case:
*/
if (uval & FUTEX_OWNER_DIED) {
-@@ -1006,11 +1080,11 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
+@@ -1006,11 +1081,11 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
* is not 0. Inconsistent state. [5]
*/
if (pid)
@@ -11918,7 +12139,7 @@ index 4c6b6e697b73..a01d203939cb 100644
}
/*
-@@ -1022,14 +1096,14 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
+@@ -1022,14 +1097,14 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
* Take a ref on the state and return success. [6]
*/
if (!pid)
@@ -11935,7 +12156,7 @@ index 4c6b6e697b73..a01d203939cb 100644
}
/*
-@@ -1038,11 +1112,29 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
+@@ -1038,11 +1113,29 @@ static int attach_to_pi_state(u32 uval, struct futex_pi_state *pi_state,
* user space TID. [9/10]
*/
if (pid != task_pid_vnr(pi_state->owner))
@@ -11968,7 +12189,7 @@ index 4c6b6e697b73..a01d203939cb 100644
}
/*
-@@ -1093,6 +1185,9 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
+@@ -1093,6 +1186,9 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
/*
* No existing pi state. First waiter. [2]
@@ -11978,7 +12199,7 @@ index 4c6b6e697b73..a01d203939cb 100644
*/
pi_state = alloc_pi_state();
-@@ -1117,17 +1212,18 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
+@@ -1117,17 +1213,18 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
return 0;
}
@@ -12001,7 +12222,7 @@ index 4c6b6e697b73..a01d203939cb 100644
/*
* We are the first waiter - try to look up the owner based on
-@@ -1146,7 +1242,7 @@ static int lock_pi_update_atomic(u32 __user *uaddr, u32 uval, u32 newval)
+@@ -1146,7 +1243,7 @@ static int lock_pi_update_atomic(u32 __user *uaddr, u32 uval, u32 newval)
if (unlikely(cmpxchg_futex_value_locked(&curval, uaddr, uval, newval)))
return -EFAULT;
@@ -12010,7 +12231,7 @@ index 4c6b6e697b73..a01d203939cb 100644
return curval != uval ? -EAGAIN : 0;
}
-@@ -1174,7 +1270,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
+@@ -1174,7 +1271,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
struct task_struct *task, int set_waiters)
{
u32 uval, newval, vpid = task_pid_vnr(task);
@@ -12019,7 +12240,7 @@ index 4c6b6e697b73..a01d203939cb 100644
int ret;
/*
-@@ -1200,9 +1296,9 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
+@@ -1200,9 +1297,9 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
* Lookup existing state first. If it exists, try to attach to
* its pi_state.
*/
@@ -12032,9 +12253,19 @@ index 4c6b6e697b73..a01d203939cb 100644
/*
* No waiter and user TID is 0. We are here because the
-@@ -1288,45 +1384,39 @@ static void mark_wake_futex(struct wake_q_head *wake_q, struct futex_q *q)
- * memory barrier is required here to prevent the following
- * store to lock_ptr from getting ahead of the plist_del.
+@@ -1283,50 +1380,45 @@ static void mark_wake_futex(struct wake_q_head *wake_q, struct futex_q *q)
+ wake_q_add(wake_q, p);
+ __unqueue_futex(q);
+ /*
+- * The waiting task can free the futex_q as soon as
+- * q->lock_ptr = NULL is written, without taking any locks. A
+- * memory barrier is required here to prevent the following
+- * store to lock_ptr from getting ahead of the plist_del.
++ * The waiting task can free the futex_q as soon as q->lock_ptr = NULL
++ * is written, without taking any locks. This is possible in the event
++ * of a spurious wakeup, for example. A memory barrier is required here
++ * to prevent the following store to lock_ptr from getting ahead of the
++ * plist_del in __unqueue_futex().
*/
- smp_wmb();
- q->lock_ptr = NULL;
@@ -12052,7 +12283,7 @@ index 4c6b6e697b73..a01d203939cb 100644
- struct futex_pi_state *pi_state = this->pi_state;
u32 uninitialized_var(curval), newval;
+ struct task_struct *new_owner;
-+ bool deboost = false;
++ bool postunlock = false;
WAKE_Q(wake_q);
- bool deboost;
+ WAKE_Q(wake_sleeper_q);
@@ -12101,7 +12332,7 @@ index 4c6b6e697b73..a01d203939cb 100644
*/
newval = FUTEX_WAITERS | task_pid_vnr(new_owner);
-@@ -1335,6 +1425,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
+@@ -1335,6 +1427,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
if (cmpxchg_futex_value_locked(&curval, uaddr, uval, newval)) {
ret = -EFAULT;
@@ -12109,7 +12340,7 @@ index 4c6b6e697b73..a01d203939cb 100644
} else if (curval != uval) {
/*
* If a unconditional UNLOCK_PI operation (user space did not
-@@ -1347,10 +1438,9 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
+@@ -1347,10 +1440,14 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
else
ret = -EINVAL;
}
@@ -12120,24 +12351,27 @@ index 4c6b6e697b73..a01d203939cb 100644
+
+ if (ret)
+ goto out_unlock;
++
++ /*
++ * This is a point of no return; once we modify the uval there is no
++ * going back and subsequent operations must not fail.
++ */
raw_spin_lock(&pi_state->owner->pi_lock);
WARN_ON(list_empty(&pi_state->list));
-@@ -1363,22 +1453,22 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
+@@ -1363,22 +1460,15 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
pi_state->owner = new_owner;
raw_spin_unlock(&new_owner->pi_lock);
-+ /*
-+ * We've updated the uservalue, this unlock cannot fail.
-+ */
-+ deboost = __rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q,
-+ &wake_sleeper_q);
-+
++ postunlock = __rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q,
++ &wake_sleeper_q);
+out_unlock:
raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
- deboost = rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q);
--
++ if (postunlock)
++ rt_mutex_postunlock(&wake_q, &wake_sleeper_q);
+
- /*
- * First unlock HB so the waiter does not spin on it once he got woken
- * up. Second wake up the waiter before the priority is adjusted. If we
@@ -12147,12 +12381,8 @@ index 4c6b6e697b73..a01d203939cb 100644
- spin_unlock(&hb->lock);
- wake_up_q(&wake_q);
- if (deboost)
-+ if (deboost) {
-+ wake_up_q(&wake_q);
-+ wake_up_q_sleeper(&wake_sleeper_q);
- rt_mutex_adjust_prio(current);
-+ }
-
+- rt_mutex_adjust_prio(current);
+-
- return 0;
+ return ret;
}
@@ -12546,7 +12776,19 @@ index 4c6b6e697b73..a01d203939cb 100644
goto out_put_key;
out_unlock_put_key:
-@@ -2631,7 +2788,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2603,8 +2760,10 @@ static int futex_lock_pi(u32 __user *uaddr, unsigned int flags,
+ out_put_key:
+ put_futex_key(&q.key);
+ out:
+- if (to)
++ if (to) {
++ hrtimer_cancel(&to->timer);
+ destroy_hrtimer_on_stack(&to->timer);
++ }
+ return ret != -EINTR ? ret : -ERESTARTNOINTR;
+
+ uaddr_faulted:
+@@ -2631,7 +2790,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
u32 uninitialized_var(curval), uval, vpid = task_pid_vnr(current);
union futex_key key = FUTEX_KEY_INIT;
struct futex_hash_bucket *hb;
@@ -12555,7 +12797,7 @@ index 4c6b6e697b73..a01d203939cb 100644
int ret;
retry:
-@@ -2655,12 +2812,48 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2655,12 +2814,48 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
* all and we at least want to know if user space fiddled
* with the futex value instead of blindly unlocking.
*/
@@ -12609,7 +12851,7 @@ index 4c6b6e697b73..a01d203939cb 100644
*/
if (!ret)
goto out_putkey;
-@@ -2675,7 +2868,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2675,7 +2870,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
* setting the FUTEX_WAITERS bit. Try again.
*/
if (ret == -EAGAIN) {
@@ -12617,7 +12859,7 @@ index 4c6b6e697b73..a01d203939cb 100644
put_futex_key(&key);
goto retry;
}
-@@ -2683,7 +2875,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2683,7 +2877,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
* wake_futex_pi has detected invalid state. Tell user
* space.
*/
@@ -12626,7 +12868,7 @@ index 4c6b6e697b73..a01d203939cb 100644
}
/*
-@@ -2693,8 +2885,10 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2693,8 +2887,10 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
* preserve the WAITERS bit not the OWNER_DIED one. We are the
* owner.
*/
@@ -12638,7 +12880,7 @@ index 4c6b6e697b73..a01d203939cb 100644
/*
* If uval has changed, let user space handle it.
-@@ -2708,7 +2902,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
+@@ -2708,7 +2904,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
return ret;
pi_faulted:
@@ -12646,7 +12888,7 @@ index 4c6b6e697b73..a01d203939cb 100644
put_futex_key(&key);
ret = fault_in_user_writeable(uaddr);
-@@ -2812,8 +3005,9 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2812,8 +3007,9 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
u32 __user *uaddr2)
{
struct hrtimer_sleeper timeout, *to = NULL;
@@ -12657,7 +12899,7 @@ index 4c6b6e697b73..a01d203939cb 100644
union futex_key key2 = FUTEX_KEY_INIT;
struct futex_q q = futex_q_init;
int res, ret;
-@@ -2838,10 +3032,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2838,10 +3034,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
* The waiter is allocated on our stack, manipulated by the requeue
* code while we sleep on uaddr.
*/
@@ -12669,7 +12911,7 @@ index 4c6b6e697b73..a01d203939cb 100644
ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2, VERIFY_WRITE);
if (unlikely(ret != 0))
-@@ -2872,20 +3063,55 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2872,20 +3065,55 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
/* Queue the futex_q, drop the hb lock, wait for wakeup. */
futex_wait_queue_me(hb, &q, to);
@@ -12736,7 +12978,7 @@ index 4c6b6e697b73..a01d203939cb 100644
/* Check if the requeue code acquired the second futex for us. */
if (!q.rt_waiter) {
-@@ -2894,16 +3120,19 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2894,16 +3122,19 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
* did a lock-steal - fix up the PI-state in that case.
*/
if (q.pi_state && (q.pi_state->owner != current)) {
@@ -12760,7 +13002,7 @@ index 4c6b6e697b73..a01d203939cb 100644
}
} else {
struct rt_mutex *pi_mutex;
-@@ -2915,10 +3144,14 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2915,10 +3146,14 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
*/
WARN_ON(!q.pi_state);
pi_mutex = &q.pi_state->pi_mutex;
@@ -12778,7 +13020,7 @@ index 4c6b6e697b73..a01d203939cb 100644
/*
* Fixup the pi_state owner and possibly acquire the lock if we
* haven't already.
-@@ -2936,13 +3169,20 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
+@@ -2936,13 +3171,20 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
* the fault, unlock the rt_mutex and return the fault to
* userspace.
*/
@@ -13737,7 +13979,7 @@ index d0519c3432b6..b585af9a1b50 100644
extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name);
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
-index 2c49d76f96c3..674ad9087eb5 100644
+index 2c49d76f96c3..eec63f064b3f 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -7,6 +7,11 @@
@@ -13773,7 +14015,166 @@ index 2c49d76f96c3..674ad9087eb5 100644
/*
* We can speed up the acquire/release, if there's no debugging state to be
* set up.
-@@ -414,6 +426,14 @@ static bool rt_mutex_cond_detect_deadlock(struct rt_mutex_waiter *waiter,
+@@ -222,12 +234,25 @@ static inline bool unlock_rt_mutex_safe(struct rt_mutex *lock,
+ }
+ #endif
+
++#define STEAL_NORMAL 0
++#define STEAL_LATERAL 1
++/*
++ * Only use with rt_mutex_waiter_{less,equal}()
++ */
++#define task_to_waiter(p) \
++ &(struct rt_mutex_waiter){ .prio = (p)->prio, .deadline = (p)->dl.deadline }
++
+ static inline int
+ rt_mutex_waiter_less(struct rt_mutex_waiter *left,
+- struct rt_mutex_waiter *right)
++ struct rt_mutex_waiter *right, int mode)
+ {
+- if (left->prio < right->prio)
+- return 1;
++ if (mode == STEAL_NORMAL) {
++ if (left->prio < right->prio)
++ return 1;
++ } else {
++ if (left->prio <= right->prio)
++ return 1;
++ }
+
+ /*
+ * If both waiters have dl_prio(), we check the deadlines of the
+@@ -236,12 +261,30 @@ rt_mutex_waiter_less(struct rt_mutex_waiter *left,
+ * then right waiter has a dl_prio() too.
+ */
+ if (dl_prio(left->prio))
+- return dl_time_before(left->task->dl.deadline,
+- right->task->dl.deadline);
++ return dl_time_before(left->deadline, right->deadline);
+
+ return 0;
+ }
+
++static inline int
++rt_mutex_waiter_equal(struct rt_mutex_waiter *left,
++ struct rt_mutex_waiter *right)
++{
++ if (left->prio != right->prio)
++ return 0;
++
++ /*
++ * If both waiters have dl_prio(), we check the deadlines of the
++ * associated tasks.
++ * If left waiter has a dl_prio(), and we didn't return 0 above,
++ * then right waiter has a dl_prio() too.
++ */
++ if (dl_prio(left->prio))
++ return left->deadline == right->deadline;
++
++ return 1;
++}
++
+ static void
+ rt_mutex_enqueue(struct rt_mutex *lock, struct rt_mutex_waiter *waiter)
+ {
+@@ -253,7 +296,7 @@ rt_mutex_enqueue(struct rt_mutex *lock, struct rt_mutex_waiter *waiter)
+ while (*link) {
+ parent = *link;
+ entry = rb_entry(parent, struct rt_mutex_waiter, tree_entry);
+- if (rt_mutex_waiter_less(waiter, entry)) {
++ if (rt_mutex_waiter_less(waiter, entry, STEAL_NORMAL)) {
+ link = &parent->rb_left;
+ } else {
+ link = &parent->rb_right;
+@@ -292,7 +335,7 @@ rt_mutex_enqueue_pi(struct task_struct *task, struct rt_mutex_waiter *waiter)
+ while (*link) {
+ parent = *link;
+ entry = rb_entry(parent, struct rt_mutex_waiter, pi_tree_entry);
+- if (rt_mutex_waiter_less(waiter, entry)) {
++ if (rt_mutex_waiter_less(waiter, entry, STEAL_NORMAL)) {
+ link = &parent->rb_left;
+ } else {
+ link = &parent->rb_right;
+@@ -320,72 +363,16 @@ rt_mutex_dequeue_pi(struct task_struct *task, struct rt_mutex_waiter *waiter)
+ RB_CLEAR_NODE(&waiter->pi_tree_entry);
+ }
+
+-/*
+- * Calculate task priority from the waiter tree priority
+- *
+- * Return task->normal_prio when the waiter tree is empty or when
+- * the waiter is not allowed to do priority boosting
+- */
+-int rt_mutex_getprio(struct task_struct *task)
++static void rt_mutex_adjust_prio(struct task_struct *p)
+ {
+- if (likely(!task_has_pi_waiters(task)))
+- return task->normal_prio;
++ struct task_struct *pi_task = NULL;
+
+- return min(task_top_pi_waiter(task)->prio,
+- task->normal_prio);
+-}
++ lockdep_assert_held(&p->pi_lock);
+
+-struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
+-{
+- if (likely(!task_has_pi_waiters(task)))
+- return NULL;
++ if (task_has_pi_waiters(p))
++ pi_task = task_top_pi_waiter(p)->task;
+
+- return task_top_pi_waiter(task)->task;
+-}
+-
+-/*
+- * Called by sched_setscheduler() to get the priority which will be
+- * effective after the change.
+- */
+-int rt_mutex_get_effective_prio(struct task_struct *task, int newprio)
+-{
+- if (!task_has_pi_waiters(task))
+- return newprio;
+-
+- if (task_top_pi_waiter(task)->task->prio <= newprio)
+- return task_top_pi_waiter(task)->task->prio;
+- return newprio;
+-}
+-
+-/*
+- * Adjust the priority of a task, after its pi_waiters got modified.
+- *
+- * This can be both boosting and unboosting. task->pi_lock must be held.
+- */
+-static void __rt_mutex_adjust_prio(struct task_struct *task)
+-{
+- int prio = rt_mutex_getprio(task);
+-
+- if (task->prio != prio || dl_prio(prio))
+- rt_mutex_setprio(task, prio);
+-}
+-
+-/*
+- * Adjust task priority (undo boosting). Called from the exit path of
+- * rt_mutex_slowunlock() and rt_mutex_slowlock().
+- *
+- * (Note: We do this outside of the protection of lock->wait_lock to
+- * allow the lock to be taken while or before we readjust the priority
+- * of task. We do not use the spin_xx_mutex() variants here as we are
+- * outside of the debug path.)
+- */
+-void rt_mutex_adjust_prio(struct task_struct *task)
+-{
+- unsigned long flags;
+-
+- raw_spin_lock_irqsave(&task->pi_lock, flags);
+- __rt_mutex_adjust_prio(task);
+- raw_spin_unlock_irqrestore(&task->pi_lock, flags);
++ rt_mutex_setprio(p, pi_task);
+ }
+
+ /*
+@@ -414,6 +401,14 @@ static bool rt_mutex_cond_detect_deadlock(struct rt_mutex_waiter *waiter,
return debug_rt_mutex_detect_deadlock(waiter, chwalk);
}
@@ -13788,7 +14189,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
/*
* Max number of times we'll walk the boosting chain:
*/
-@@ -421,7 +441,8 @@ int max_lock_depth = 1024;
+@@ -421,7 +416,8 @@ int max_lock_depth = 1024;
static inline struct rt_mutex *task_blocked_on_lock(struct task_struct *p)
{
@@ -13798,7 +14199,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
}
/*
-@@ -557,7 +578,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+@@ -557,7 +553,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
* reached or the state of the chain has changed while we
* dropped the locks.
*/
@@ -13807,7 +14208,43 @@ index 2c49d76f96c3..674ad9087eb5 100644
goto out_unlock_pi;
/*
-@@ -719,13 +740,16 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+@@ -608,7 +604,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+ * enabled we continue, but stop the requeueing in the chain
+ * walk.
+ */
+- if (waiter->prio == task->prio) {
++ if (rt_mutex_waiter_equal(waiter, task_to_waiter(task))) {
+ if (!detect_deadlock)
+ goto out_unlock_pi;
+ else
+@@ -704,7 +700,26 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+
+ /* [7] Requeue the waiter in the lock waiter tree. */
+ rt_mutex_dequeue(lock, waiter);
++
++ /*
++ * Update the waiter prio fields now that we're dequeued.
++ *
++ * These values can have changed through either:
++ *
++ * sys_sched_set_scheduler() / sys_sched_setattr()
++ *
++ * or
++ *
++ * DL CBS enforcement advancing the effective deadline.
++ *
++ * Even though pi_waiters also uses these fields, and that tree is only
++ * updated in [11], we can do this here, since we hold [L], which
++ * serializes all pi_waiters access and rb_erase() does not care about
++ * the values of the node being removed.
++ */
+ waiter->prio = task->prio;
++ waiter->deadline = task->dl.deadline;
++
+ rt_mutex_enqueue(lock, waiter);
+
+ /* [8] Release the task */
+@@ -719,13 +734,16 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
* follow here. This is the end of the chain we are walking.
*/
if (!rt_mutex_owner(lock)) {
@@ -13826,33 +14263,33 @@ index 2c49d76f96c3..674ad9087eb5 100644
raw_spin_unlock_irq(&lock->wait_lock);
return 0;
}
-@@ -818,6 +842,25 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+@@ -745,7 +763,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+ */
+ rt_mutex_dequeue_pi(task, prerequeue_top_waiter);
+ rt_mutex_enqueue_pi(task, waiter);
+- __rt_mutex_adjust_prio(task);
++ rt_mutex_adjust_prio(task);
+
+ } else if (prerequeue_top_waiter == waiter) {
+ /*
+@@ -761,7 +779,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+ rt_mutex_dequeue_pi(task, waiter);
+ waiter = rt_mutex_top_waiter(lock);
+ rt_mutex_enqueue_pi(task, waiter);
+- __rt_mutex_adjust_prio(task);
++ rt_mutex_adjust_prio(task);
+ } else {
+ /*
+ * Nothing changed. No need to do any priority
+@@ -818,6 +836,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
return ret;
}
+
-+#define STEAL_NORMAL 0
-+#define STEAL_LATERAL 1
-+
-+/*
-+ * Note that RT tasks are excluded from lateral-steals to prevent the
-+ * introduction of an unbounded latency
-+ */
-+static inline int lock_is_stealable(struct task_struct *task,
-+ struct task_struct *pendowner, int mode)
-+{
-+ if (mode == STEAL_NORMAL || rt_task(task)) {
-+ if (task->prio >= pendowner->prio)
-+ return 0;
-+ } else if (task->prio > pendowner->prio)
-+ return 0;
-+ return 1;
-+}
-+
/*
* Try to take an rt-mutex
*
-@@ -828,8 +871,9 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
+@@ -828,9 +847,12 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
* @waiter: The waiter that is queued to the lock's wait tree if the
* callsite called task_blocked_on_lock(), otherwise NULL
*/
@@ -13862,39 +14299,53 @@ index 2c49d76f96c3..674ad9087eb5 100644
+ struct task_struct *task,
+ struct rt_mutex_waiter *waiter, int mode)
{
++ lockdep_assert_held(&lock->wait_lock);
++
/*
* Before testing whether we can acquire @lock, we set the
-@@ -866,8 +910,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
+ * RT_MUTEX_HAS_WAITERS bit in @lock->owner. This forces all
+@@ -866,8 +888,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
* If waiter is not the highest priority waiter of
* @lock, give up.
*/
- if (waiter != rt_mutex_top_waiter(lock))
+ if (waiter != rt_mutex_top_waiter(lock)) {
-+ /* XXX lock_is_stealable() ? */
++ /* XXX rt_mutex_waiter_less() ? */
return 0;
+ }
/*
* We can acquire the lock. Remove the waiter from the
-@@ -885,14 +931,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
+@@ -885,14 +909,26 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
* not need to be dequeued.
*/
if (rt_mutex_has_waiters(lock)) {
-- /*
-- * If @task->prio is greater than or equal to
-- * the top waiter priority (kernel view),
-- * @task lost.
-- */
-- if (task->prio >= rt_mutex_top_waiter(lock)->prio)
-- return 0;
+ struct task_struct *pown = rt_mutex_top_waiter(lock)->task;
-
-+ if (task != pown && !lock_is_stealable(task, pown, mode))
++
++ if (task != pown)
+ return 0;
++
++ /*
++ * Note that RT tasks are excluded from lateral-steals
++ * to prevent the introduction of an unbounded latency.
++ */
++ if (rt_task(task))
++ mode = STEAL_NORMAL;
+ /*
+ * If @task->prio is greater than or equal to
+ * the top waiter priority (kernel view),
+ * @task lost.
+ */
+- if (task->prio >= rt_mutex_top_waiter(lock)->prio)
++ if (!rt_mutex_waiter_less(task_to_waiter(task),
++ rt_mutex_top_waiter(lock),
++ mode))
+ return 0;
+-
/*
* The current top waiter stays enqueued. We
* don't have to change anything in the lock
-@@ -936,11 +978,395 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
+@@ -936,11 +972,384 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
*/
rt_mutex_set_owner(lock, task);
@@ -14064,9 +14515,9 @@ index 2c49d76f96c3..674ad9087eb5 100644
+ debug_rt_mutex_free_waiter(&waiter);
+}
+
-+static void mark_wakeup_next_waiter(struct wake_q_head *wake_q,
-+ struct wake_q_head *wake_sleeper_q,
-+ struct rt_mutex *lock);
++static bool __sched __rt_mutex_unlock_common(struct rt_mutex *lock,
++ struct wake_q_head *wake_q,
++ struct wake_q_head *wq_sleeper);
+/*
+ * Slow path to release a rt_mutex spin_lock style
+ */
@@ -14075,25 +14526,14 @@ index 2c49d76f96c3..674ad9087eb5 100644
+ unsigned long flags;
+ WAKE_Q(wake_q);
+ WAKE_Q(wake_sleeper_q);
++ bool postunlock;
+
+ raw_spin_lock_irqsave(&lock->wait_lock, flags);
-+
-+ debug_rt_mutex_unlock(lock);
-+
-+ if (!rt_mutex_has_waiters(lock)) {
-+ lock->owner = NULL;
-+ raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
-+ return;
-+ }
-+
-+ mark_wakeup_next_waiter(&wake_q, &wake_sleeper_q, lock);
-+
++ postunlock = __rt_mutex_unlock_common(lock, &wake_q, &wake_sleeper_q);
+ raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
-+ wake_up_q(&wake_q);
-+ wake_up_q_sleeper(&wake_sleeper_q);
+
-+ /* Undo pi boosting.when necessary */
-+ rt_mutex_adjust_prio(current);
++ if (postunlock)
++ rt_mutex_postunlock(&wake_q, &wake_sleeper_q);
+}
+
+void __lockfunc rt_spin_lock__no_mg(spinlock_t *lock)
@@ -14292,10 +14732,20 @@ index 2c49d76f96c3..674ad9087eb5 100644
/*
* Task blocks on lock.
*
-@@ -971,6 +1397,23 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
+@@ -958,6 +1367,8 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
+ struct rt_mutex *next_lock;
+ int chain_walk = 0, res;
+
++ lockdep_assert_held(&lock->wait_lock);
++
+ /*
+ * Early deadlock detection. We really don't want the task to
+ * enqueue on itself just to untangle the mess later. It's not
+@@ -971,10 +1382,28 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
return -EDEADLK;
raw_spin_lock(&task->pi_lock);
+- __rt_mutex_adjust_prio(task);
+
+ /*
+ * In the case of futex requeue PI, this will be a proxy
@@ -14313,19 +14763,26 @@ index 2c49d76f96c3..674ad9087eb5 100644
+
+ BUG_ON(rt_mutex_real_waiter(task->pi_blocked_on));
+
- __rt_mutex_adjust_prio(task);
++ rt_mutex_adjust_prio(task);
waiter->task = task;
waiter->lock = lock;
-@@ -994,7 +1437,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
+ waiter->prio = task->prio;
++ waiter->deadline = task->dl.deadline;
+
+ /* Get the top priority waiter on the lock */
+ if (rt_mutex_has_waiters(lock))
+@@ -993,8 +1422,8 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
+ rt_mutex_dequeue_pi(owner, top_waiter);
rt_mutex_enqueue_pi(owner, waiter);
- __rt_mutex_adjust_prio(owner);
+- __rt_mutex_adjust_prio(owner);
- if (owner->pi_blocked_on)
++ rt_mutex_adjust_prio(owner);
+ if (rt_mutex_real_waiter(owner->pi_blocked_on))
chain_walk = 1;
} else if (rt_mutex_cond_detect_deadlock(waiter, chwalk)) {
chain_walk = 1;
-@@ -1036,6 +1479,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
+@@ -1036,6 +1465,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
* Called with lock->wait_lock held and interrupts disabled.
*/
static void mark_wakeup_next_waiter(struct wake_q_head *wake_q,
@@ -14333,29 +14790,67 @@ index 2c49d76f96c3..674ad9087eb5 100644
struct rt_mutex *lock)
{
struct rt_mutex_waiter *waiter;
-@@ -1064,7 +1508,10 @@ static void mark_wakeup_next_waiter(struct wake_q_head *wake_q,
+@@ -1045,12 +1475,14 @@ static void mark_wakeup_next_waiter(struct wake_q_head *wake_q,
+ waiter = rt_mutex_top_waiter(lock);
- raw_spin_unlock(¤t->pi_lock);
+ /*
+- * Remove it from current->pi_waiters. We do not adjust a
+- * possible priority boost right now. We execute wakeup in the
+- * boosted mode and go back to normal after releasing
+- * lock->wait_lock.
++ * Remove it from current->pi_waiters and deboost.
++ *
++ * We must in fact deboost here in order to ensure we call
++ * rt_mutex_setprio() to update p->pi_top_task before the
++ * task unblocks.
+ */
+ rt_mutex_dequeue_pi(current, waiter);
++ rt_mutex_adjust_prio(current);
-- wake_q_add(wake_q, waiter->task);
+ /*
+ * As we are waking up the top waiter, and the waiter stays
+@@ -1062,9 +1494,22 @@ static void mark_wakeup_next_waiter(struct wake_q_head *wake_q,
+ */
+ lock->owner = (void *) RT_MUTEX_HAS_WAITERS;
+
++ /*
++ * We deboosted before waking the top waiter task such that we don't
++ * run two tasks with the 'same' priority (and ensure the
++ * p->pi_top_task pointer points to a blocked task). This however can
++ * lead to priority inversion if we would get preempted after the
++ * deboost but before waking our donor task, hence the preempt_disable()
++ * before unlock.
++ *
++ * Pairs with preempt_enable() in rt_mutex_postunlock();
++ */
++ preempt_disable();
+ if (waiter->savestate)
+ wake_q_add(wake_sleeper_q, waiter->task);
+ else
+ wake_q_add(wake_q, waiter->task);
+ raw_spin_unlock(¤t->pi_lock);
+-
+- wake_q_add(wake_q, waiter->task);
}
/*
-@@ -1078,7 +1525,7 @@ static void remove_waiter(struct rt_mutex *lock,
+@@ -1078,7 +1523,9 @@ static void remove_waiter(struct rt_mutex *lock,
{
bool is_top_waiter = (waiter == rt_mutex_top_waiter(lock));
struct task_struct *owner = rt_mutex_owner(lock);
- struct rt_mutex *next_lock;
+ struct rt_mutex *next_lock = NULL;
++
++ lockdep_assert_held(&lock->wait_lock);
raw_spin_lock(¤t->pi_lock);
rt_mutex_dequeue(lock, waiter);
-@@ -1102,7 +1549,8 @@ static void remove_waiter(struct rt_mutex *lock,
- __rt_mutex_adjust_prio(owner);
+@@ -1099,10 +1546,11 @@ static void remove_waiter(struct rt_mutex *lock,
+ if (rt_mutex_has_waiters(lock))
+ rt_mutex_enqueue_pi(owner, rt_mutex_top_waiter(lock));
+
+- __rt_mutex_adjust_prio(owner);
++ rt_mutex_adjust_prio(owner);
/* Store the lock on which owner is blocked or NULL */
- next_lock = task_blocked_on_lock(owner);
@@ -14369,8 +14864,9 @@ index 2c49d76f96c3..674ad9087eb5 100644
waiter = task->pi_blocked_on;
- if (!waiter || (waiter->prio == task->prio &&
-+ if (!rt_mutex_real_waiter(waiter) || (waiter->prio == task->prio &&
- !dl_prio(task->prio))) {
+- !dl_prio(task->prio))) {
++ if (!rt_mutex_real_waiter(waiter) ||
++ rt_mutex_waiter_equal(waiter, task_to_waiter(task))) {
raw_spin_unlock_irqrestore(&task->pi_lock, flags);
return;
}
@@ -14627,8 +15123,13 @@ index 2c49d76f96c3..674ad9087eb5 100644
raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
-@@ -1331,7 +1889,8 @@ static inline int rt_mutex_slowtrylock(struct rt_mutex *lock)
- * Return whether the current task needs to undo a potential priority boosting.
+@@ -1328,10 +1886,12 @@ static inline int rt_mutex_slowtrylock(struct rt_mutex *lock)
+
+ /*
+ * Slow path to release a rt-mutex.
+- * Return whether the current task needs to undo a potential priority boosting.
++ *
++ * Return whether the current task needs to call rt_mutex_postunlock().
*/
static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
- struct wake_q_head *wake_q)
@@ -14637,7 +15138,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
{
unsigned long flags;
-@@ -1340,8 +1899,6 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
+@@ -1340,8 +1900,6 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
debug_rt_mutex_unlock(lock);
@@ -14646,16 +15147,22 @@ index 2c49d76f96c3..674ad9087eb5 100644
/*
* We must be careful here if the fast path is enabled. If we
* have no waiters queued we cannot set owner to NULL here
-@@ -1387,7 +1944,7 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
+@@ -1387,12 +1945,10 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
*
* Queue the next waiter for wakeup once we release the wait_lock.
*/
- mark_wakeup_next_waiter(wake_q, lock);
+-
+ mark_wakeup_next_waiter(wake_q, wake_sleeper_q, lock);
-
raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
-@@ -1403,63 +1960,79 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
+- /* check PI boosting */
+- return true;
++ return true; /* call rt_mutex_postunlock() */
+ }
+
+ /*
+@@ -1403,63 +1959,85 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
*/
static inline int
rt_mutex_fastlock(struct rt_mutex *lock, int state,
@@ -14711,6 +15218,19 @@ index 2c49d76f96c3..674ad9087eb5 100644
return slowfn(lock);
}
++/*
++ * Performs the wakeup of the the top-waiter and re-enables preemption.
++ */
++void rt_mutex_postunlock(struct wake_q_head *wake_q,
++ struct wake_q_head *wq_sleeper)
++{
++ wake_up_q(wake_q);
++ wake_up_q_sleeper(wq_sleeper);
++
++ /* Pairs with preempt_disable() in rt_mutex_slowunlock() */
++ preempt_enable();
++}
++
static inline void
rt_mutex_fastunlock(struct rt_mutex *lock,
bool (*slowfn)(struct rt_mutex *lock,
@@ -14720,7 +15240,6 @@ index 2c49d76f96c3..674ad9087eb5 100644
{
WAKE_Q(wake_q);
+ WAKE_Q(wake_sleeper_q);
-+ bool deboost;
- if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
- rt_mutex_deadlock_account_unlock(current);
@@ -14729,21 +15248,11 @@ index 2c49d76f96c3..674ad9087eb5 100644
- } else {
- bool deboost = slowfn(lock, &wake_q);
-+ deboost = slowfn(lock, &wake_q, &wake_sleeper_q);
++ if (slowfn(lock, &wake_q, &wake_sleeper_q))
++ rt_mutex_postunlock(&wake_q, &wake_sleeper_q);
++}
- wake_up_q(&wake_q);
-+ wake_up_q(&wake_q);
-+ wake_up_q_sleeper(&wake_sleeper_q);
-
-- /* Undo pi boosting if necessary: */
-- if (deboost)
-- rt_mutex_adjust_prio(current);
-- }
-+ /* Undo pi boosting if necessary: */
-+ if (deboost)
-+ rt_mutex_adjust_prio(current);
-+}
-+
+/**
+ * rt_mutex_lock_state - lock a rt_mutex with a given state
+ *
@@ -14753,12 +15262,16 @@ index 2c49d76f96c3..674ad9087eb5 100644
+int __sched rt_mutex_lock_state(struct rt_mutex *lock, int state)
+{
+ might_sleep();
-+
+
+- /* Undo pi boosting if necessary: */
+- if (deboost)
+- rt_mutex_adjust_prio(current);
+- }
+ return rt_mutex_fastlock(lock, state, NULL, rt_mutex_slowlock);
}
/**
-@@ -1469,15 +2042,13 @@ rt_mutex_fastunlock(struct rt_mutex *lock,
+@@ -1469,15 +2047,13 @@ rt_mutex_fastunlock(struct rt_mutex *lock,
*/
void __sched rt_mutex_lock(struct rt_mutex *lock)
{
@@ -14776,7 +15289,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
* @lock: the rt_mutex to be locked
*
* Returns:
-@@ -1486,23 +2057,32 @@ EXPORT_SYMBOL_GPL(rt_mutex_lock);
+@@ -1486,23 +2062,32 @@ EXPORT_SYMBOL_GPL(rt_mutex_lock);
*/
int __sched rt_mutex_lock_interruptible(struct rt_mutex *lock)
{
@@ -14820,7 +15333,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
}
/**
-@@ -1525,6 +2105,7 @@ rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout)
+@@ -1525,6 +2110,7 @@ rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout)
return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout,
RT_MUTEX_MIN_CHAINWALK,
@@ -14828,7 +15341,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
rt_mutex_slowlock);
}
EXPORT_SYMBOL_GPL(rt_mutex_timed_lock);
-@@ -1542,7 +2123,11 @@ EXPORT_SYMBOL_GPL(rt_mutex_timed_lock);
+@@ -1542,7 +2128,11 @@ EXPORT_SYMBOL_GPL(rt_mutex_timed_lock);
*/
int __sched rt_mutex_trylock(struct rt_mutex *lock)
{
@@ -14840,23 +15353,22 @@ index 2c49d76f96c3..674ad9087eb5 100644
return 0;
return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock);
-@@ -1561,20 +2146,41 @@ void __sched rt_mutex_unlock(struct rt_mutex *lock)
+@@ -1560,21 +2150,53 @@ void __sched rt_mutex_unlock(struct rt_mutex *lock)
+ }
EXPORT_SYMBOL_GPL(rt_mutex_unlock);
- /**
+-/**
- * rt_mutex_futex_unlock - Futex variant of rt_mutex_unlock
- * @lock: the rt_mutex to be unlocked
- *
- * Returns: true/false indicating whether priority adjustment is
- * required or not.
-+ * Futex variant, that since futex variants do not use the fast-path, can be
-+ * simple and will not need to retry.
- */
+- */
-bool __sched rt_mutex_futex_unlock(struct rt_mutex *lock,
- struct wake_q_head *wqh)
-+bool __sched __rt_mutex_futex_unlock(struct rt_mutex *lock,
-+ struct wake_q_head *wake_q,
-+ struct wake_q_head *wq_sleeper)
++static bool __sched __rt_mutex_unlock_common(struct rt_mutex *lock,
++ struct wake_q_head *wake_q,
++ struct wake_q_head *wq_sleeper)
{
- if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
- rt_mutex_deadlock_account_unlock(current);
@@ -14868,32 +15380,47 @@ index 2c49d76f96c3..674ad9087eb5 100644
+ if (!rt_mutex_has_waiters(lock)) {
+ lock->owner = NULL;
+ return false; /* done */
-+ }
+ }
+- return rt_mutex_slowunlock(lock, wqh);
+
++ /*
++ * We've already deboosted, mark_wakeup_next_waiter() will
++ * retain preempt_disabled when we drop the wait_lock, to
++ * avoid inversion prior to the wakeup. preempt_disable()
++ * therein pairs with rt_mutex_postunlock().
++ */
+ mark_wakeup_next_waiter(wake_q, wq_sleeper, lock);
-+ return true; /* deboost and wakeups */
++
++ return true; /* call postunlock() */
++}
++
++/**
++ * Futex variant, that since futex variants do not use the fast-path, can be
++ * simple and will not need to retry.
++ */
++bool __sched __rt_mutex_futex_unlock(struct rt_mutex *lock,
++ struct wake_q_head *wake_q,
++ struct wake_q_head *wq_sleeper)
++{
++ return __rt_mutex_unlock_common(lock, wake_q, wq_sleeper);
+}
+
+void __sched rt_mutex_futex_unlock(struct rt_mutex *lock)
+{
+ WAKE_Q(wake_q);
+ WAKE_Q(wake_sleeper_q);
-+ bool deboost;
++ bool postunlock;
+
+ raw_spin_lock_irq(&lock->wait_lock);
-+ deboost = __rt_mutex_futex_unlock(lock, &wake_q, &wake_sleeper_q);
++ postunlock = __rt_mutex_futex_unlock(lock, &wake_q, &wake_sleeper_q);
+ raw_spin_unlock_irq(&lock->wait_lock);
+
-+ if (deboost) {
-+ wake_up_q(&wake_q);
-+ wake_up_q_sleeper(&wake_sleeper_q);
-+ rt_mutex_adjust_prio(current);
- }
-- return rt_mutex_slowunlock(lock, wqh);
++ if (postunlock)
++ rt_mutex_postunlock(&wake_q, &wake_sleeper_q);
}
/**
-@@ -1607,13 +2213,12 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy);
+@@ -1607,13 +2229,12 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy);
void __rt_mutex_init(struct rt_mutex *lock, const char *name)
{
lock->owner = NULL;
@@ -14908,7 +15435,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
/**
* rt_mutex_init_proxy_locked - initialize and lock a rt_mutex on behalf of a
-@@ -1628,10 +2233,9 @@ EXPORT_SYMBOL_GPL(__rt_mutex_init);
+@@ -1628,10 +2249,9 @@ EXPORT_SYMBOL_GPL(__rt_mutex_init);
void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
struct task_struct *proxy_owner)
{
@@ -14920,7 +15447,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
}
/**
-@@ -1647,7 +2251,66 @@ void rt_mutex_proxy_unlock(struct rt_mutex *lock,
+@@ -1647,7 +2267,66 @@ void rt_mutex_proxy_unlock(struct rt_mutex *lock,
{
debug_rt_mutex_proxy_unlock(lock);
rt_mutex_set_owner(lock, NULL);
@@ -14988,7 +15515,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
}
/**
-@@ -1670,33 +2333,9 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
+@@ -1670,33 +2349,9 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
int ret;
raw_spin_lock_irq(&lock->wait_lock);
@@ -15023,7 +15550,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
return ret;
}
-@@ -1721,21 +2360,23 @@ struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock)
+@@ -1721,24 +2376,27 @@ struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock)
}
/**
@@ -15051,7 +15578,11 @@ index 2c49d76f96c3..674ad9087eb5 100644
struct hrtimer_sleeper *to,
struct rt_mutex_waiter *waiter)
{
-@@ -1746,10 +2387,47 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
++ struct task_struct *tsk = current;
+ int ret;
+
+ raw_spin_lock_irq(&lock->wait_lock);
+@@ -1746,10 +2404,65 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
set_current_state(TASK_INTERRUPTIBLE);
/* sleep on the mutex */
@@ -15059,6 +15590,24 @@ index 2c49d76f96c3..674ad9087eb5 100644
+ ret = __rt_mutex_slowlock(lock, TASK_INTERRUPTIBLE, to, waiter, NULL);
- if (unlikely(ret))
++ /*
++ * RT has a problem here when the wait got interrupted by a timeout
++ * or a signal. task->pi_blocked_on is still set. The task must
++ * acquire the hash bucket lock when returning from this function.
++ *
++ * If the hash bucket lock is contended then the
++ * BUG_ON(rt_mutex_real_waiter(task->pi_blocked_on)) in
++ * task_blocks_on_rt_mutex() will trigger. This can be avoided by
++ * clearing task->pi_blocked_on which removes the task from the
++ * boosting chain of the rtmutex. That's correct because the task
++ * is not longer blocked on it.
++ */
++ if (ret) {
++ raw_spin_lock(&tsk->pi_lock);
++ tsk->pi_blocked_on = NULL;
++ raw_spin_unlock(&tsk->pi_lock);
++ }
++
+ raw_spin_unlock_irq(&lock->wait_lock);
+
+ return ret;
@@ -15101,7 +15650,7 @@ index 2c49d76f96c3..674ad9087eb5 100644
/*
* try_to_take_rt_mutex() sets the waiter bit unconditionally. We might
-@@ -1759,5 +2437,91 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
+@@ -1759,5 +2472,91 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
raw_spin_unlock_irq(&lock->wait_lock);
@@ -15207,10 +15756,10 @@ index c4060584c407..6607802efa8b 100644
#define debug_rt_mutex_free_waiter(w) do { } while (0)
#define debug_rt_mutex_lock(l) do { } while (0)
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h
-index e317e1cbb3eb..819826407462 100644
+index e317e1cbb3eb..64d89d780059 100644
--- a/kernel/locking/rtmutex_common.h
+++ b/kernel/locking/rtmutex_common.h
-@@ -27,6 +27,7 @@ struct rt_mutex_waiter {
+@@ -27,12 +27,14 @@ struct rt_mutex_waiter {
struct rb_node pi_tree_entry;
struct task_struct *task;
struct rt_mutex *lock;
@@ -15218,7 +15767,14 @@ index e317e1cbb3eb..819826407462 100644
#ifdef CONFIG_DEBUG_RT_MUTEXES
unsigned long ip;
struct pid *deadlock_task_pid;
-@@ -98,22 +99,45 @@ enum rtmutex_chainwalk {
+ struct rt_mutex *deadlock_lock;
+ #endif
+ int prio;
++ u64 deadline;
+ };
+
+ /*
+@@ -98,21 +100,45 @@ enum rtmutex_chainwalk {
/*
* PI-futex support (proxy locking functions, etc.):
*/
@@ -15243,6 +15799,7 @@ index e317e1cbb3eb..819826407462 100644
-extern int rt_mutex_timed_futex_lock(struct rt_mutex *l, struct hrtimer_sleeper *to);
-extern bool rt_mutex_futex_unlock(struct rt_mutex *lock,
- struct wake_q_head *wqh);
+-extern void rt_mutex_adjust_prio(struct task_struct *task);
+extern int rt_mutex_wait_proxy_lock(struct rt_mutex *lock,
+ struct hrtimer_sleeper *to,
+ struct rt_mutex_waiter *waiter);
@@ -15256,8 +15813,9 @@ index e317e1cbb3eb..819826407462 100644
+ struct wake_q_head *wqh,
+ struct wake_q_head *wq_sleeper);
+
- extern void rt_mutex_adjust_prio(struct task_struct *task);
-
++extern void rt_mutex_postunlock(struct wake_q_head *wake_q,
++ struct wake_q_head *wq_sleeper);
++
+/* RW semaphore special interface */
+struct ww_acquire_ctx;
+
@@ -15266,10 +15824,9 @@ index e317e1cbb3eb..819826407462 100644
+ enum rtmutex_chainwalk chwalk,
+ struct ww_acquire_ctx *ww_ctx,
+ struct rt_mutex_waiter *waiter);
-+
+
#ifdef CONFIG_DEBUG_RT_MUTEXES
# include "rtmutex-debug.h"
- #else
diff --git a/kernel/locking/rwsem-rt.c b/kernel/locking/rwsem-rt.c
new file mode 100644
index 000000000000..4a708ffcded6
@@ -16097,7 +16654,7 @@ index 9c5b231684d0..cf15bdb6855b 100644
* console_unblank can no longer be called in interrupt context unless
* oops_in_progress is set to 1..
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
-index 49ba7c1ade9d..44f44b47ec07 100644
+index a5caecef88be..61e7c5e2183c 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -166,7 +166,14 @@ static bool ptrace_freeze_traced(struct task_struct *task)
@@ -16915,7 +17472,7 @@ index 8d0f35debf35..b62cf6400fe0 100644
}
EXPORT_SYMBOL(completion_done);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
-index 154fd689fe02..a6aa5801b21e 100644
+index 154fd689fe02..30b24f774198 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -129,7 +129,11 @@ const_debug unsigned int sysctl_sched_features =
@@ -17535,7 +18092,130 @@ index 154fd689fe02..a6aa5801b21e 100644
exception_exit(prev_ctx);
preempt_latency_stop(1);
-@@ -4939,6 +5172,7 @@ int __cond_resched_lock(spinlock_t *lock)
+@@ -3629,10 +3862,25 @@ EXPORT_SYMBOL(default_wake_function);
+
+ #ifdef CONFIG_RT_MUTEXES
+
++static inline int __rt_effective_prio(struct task_struct *pi_task, int prio)
++{
++ if (pi_task)
++ prio = min(prio, pi_task->prio);
++
++ return prio;
++}
++
++static inline int rt_effective_prio(struct task_struct *p, int prio)
++{
++ struct task_struct *pi_task = rt_mutex_get_top_task(p);
++
++ return __rt_effective_prio(pi_task, prio);
++}
++
+ /*
+ * rt_mutex_setprio - set the current priority of a task
+- * @p: task
+- * @prio: prio value (kernel-internal form)
++ * @p: task to boost
++ * @pi_task: donor task
+ *
+ * This function changes the 'effective' priority of a task. It does
+ * not touch ->normal_prio like __setscheduler().
+@@ -3640,16 +3888,40 @@ EXPORT_SYMBOL(default_wake_function);
+ * Used by the rt_mutex code to implement priority inheritance
+ * logic. Call site only calls if the priority of the task changed.
+ */
+-void rt_mutex_setprio(struct task_struct *p, int prio)
++void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task)
+ {
+- int oldprio, queued, running, queue_flag = DEQUEUE_SAVE | DEQUEUE_MOVE;
++ int prio, oldprio, queued, running, queue_flag = DEQUEUE_SAVE | DEQUEUE_MOVE;
+ const struct sched_class *prev_class;
+ struct rq_flags rf;
+ struct rq *rq;
+
+- BUG_ON(prio > MAX_PRIO);
++ /* XXX used to be waiter->prio, not waiter->task->prio */
++ prio = __rt_effective_prio(pi_task, p->normal_prio);
++
++ /*
++ * If nothing changed; bail early.
++ */
++ if (p->pi_top_task == pi_task && prio == p->prio && !dl_prio(prio))
++ return;
+
+ rq = __task_rq_lock(p, &rf);
++ /*
++ * Set under pi_lock && rq->lock, such that the value can be used under
++ * either lock.
++ *
++ * Note that there is loads of tricky to make this pointer cache work
++ * right. rt_mutex_slowunlock()+rt_mutex_postunlock() work together to
++ * ensure a task is de-boosted (pi_task is set to NULL) before the
++ * task is allowed to run again (and can exit). This ensures the pointer
++ * points to a blocked task -- which guaratees the task is present.
++ */
++ p->pi_top_task = pi_task;
++
++ /*
++ * For FIFO/RR we only need to set prio, if that matches we're done.
++ */
++ if (prio == p->prio && !dl_prio(prio))
++ goto out_unlock;
+
+ /*
+ * Idle task boosting is a nono in general. There is one
+@@ -3669,7 +3941,7 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
+ goto out_unlock;
+ }
+
+- trace_sched_pi_setprio(p, prio);
++ trace_sched_pi_setprio(p, pi_task);
+ oldprio = p->prio;
+
+ if (oldprio == prio)
+@@ -3693,7 +3965,6 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
+ * running task
+ */
+ if (dl_prio(prio)) {
+- struct task_struct *pi_task = rt_mutex_get_top_task(p);
+ if (!dl_prio(p->normal_prio) ||
+ (pi_task && dl_entity_preempt(&pi_task->dl, &p->dl))) {
+ p->dl.dl_boosted = 1;
+@@ -3730,6 +4001,11 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
+ balance_callback(rq);
+ preempt_enable();
+ }
++#else
++static inline int rt_effective_prio(struct task_struct *p, int prio)
++{
++ return prio;
++}
+ #endif
+
+ void set_user_nice(struct task_struct *p, long nice)
+@@ -3974,10 +4250,9 @@ static void __setscheduler(struct rq *rq, struct task_struct *p,
+ * Keep a potential priority boosting if called from
+ * sched_setscheduler().
+ */
++ p->prio = normal_prio(p);
+ if (keep_boost)
+- p->prio = rt_mutex_get_effective_prio(p, normal_prio(p));
+- else
+- p->prio = normal_prio(p);
++ p->prio = rt_effective_prio(p, p->prio);
+
+ if (dl_prio(p->prio))
+ p->sched_class = &dl_sched_class;
+@@ -4264,7 +4539,7 @@ static int __sched_setscheduler(struct task_struct *p,
+ * the runqueue. This will be done when the task deboost
+ * itself.
+ */
+- new_effective_prio = rt_mutex_get_effective_prio(p, newprio);
++ new_effective_prio = rt_effective_prio(p, newprio);
+ if (new_effective_prio == oldprio)
+ queue_flags &= ~DEQUEUE_MOVE;
+ }
+@@ -4939,6 +5214,7 @@ int __cond_resched_lock(spinlock_t *lock)
}
EXPORT_SYMBOL(__cond_resched_lock);
@@ -17543,7 +18223,7 @@ index 154fd689fe02..a6aa5801b21e 100644
int __sched __cond_resched_softirq(void)
{
BUG_ON(!in_softirq());
-@@ -4952,6 +5186,7 @@ int __sched __cond_resched_softirq(void)
+@@ -4952,6 +5228,7 @@ int __sched __cond_resched_softirq(void)
return 0;
}
EXPORT_SYMBOL(__cond_resched_softirq);
@@ -17551,7 +18231,7 @@ index 154fd689fe02..a6aa5801b21e 100644
/**
* yield - yield the current processor to other threads.
-@@ -5315,7 +5550,9 @@ void init_idle(struct task_struct *idle, int cpu)
+@@ -5315,7 +5592,9 @@ void init_idle(struct task_struct *idle, int cpu)
/* Set the preempt count _outside_ the spinlocks! */
init_idle_preempt_count(idle, cpu);
@@ -17562,7 +18242,7 @@ index 154fd689fe02..a6aa5801b21e 100644
/*
* The idle tasks have their own, simple scheduling class:
*/
-@@ -5458,6 +5695,8 @@ void sched_setnuma(struct task_struct *p, int nid)
+@@ -5458,6 +5737,8 @@ void sched_setnuma(struct task_struct *p, int nid)
#endif /* CONFIG_NUMA_BALANCING */
#ifdef CONFIG_HOTPLUG_CPU
@@ -17571,7 +18251,7 @@ index 154fd689fe02..a6aa5801b21e 100644
/*
* Ensures that the idle task is using init_mm right before its cpu goes
* offline.
-@@ -5472,7 +5711,12 @@ void idle_task_exit(void)
+@@ -5472,7 +5753,12 @@ void idle_task_exit(void)
switch_mm_irqs_off(mm, &init_mm, current);
finish_arch_post_lock_switch();
}
@@ -17585,7 +18265,7 @@ index 154fd689fe02..a6aa5801b21e 100644
}
/*
-@@ -7418,6 +7662,10 @@ int sched_cpu_dying(unsigned int cpu)
+@@ -7418,6 +7704,10 @@ int sched_cpu_dying(unsigned int cpu)
update_max_interval();
nohz_balance_exit_idle(cpu);
hrtick_clear(rq);
@@ -17596,7 +18276,7 @@ index 154fd689fe02..a6aa5801b21e 100644
return 0;
}
#endif
-@@ -7698,7 +7946,7 @@ void __init sched_init(void)
+@@ -7698,7 +7988,7 @@ void __init sched_init(void)
#ifdef CONFIG_DEBUG_ATOMIC_SLEEP
static inline int preempt_count_equals(int preempt_offset)
{
@@ -22081,7 +22761,7 @@ index 000000000000..7f6ee70dea41
+
+device_initcall(latency_hist_init);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
-index 90b66ed6f0e2..7d9897e41ded 100644
+index 83c60f9013cb..6fb207964a84 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1897,6 +1897,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
@@ -22152,7 +22832,7 @@ index 90b66ed6f0e2..7d9897e41ded 100644
void
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
-index fd24b1f9ac43..852b2c81be25 100644
+index b0d8576c27ae..702b9376b278 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -124,6 +124,7 @@ struct kretprobe_trace_entry_head {
@@ -23597,11 +24277,11 @@ index 1afec32de6f2..11fa431046a8 100644
dump_stack();
diff --git a/localversion-rt b/localversion-rt
new file mode 100644
-index 000000000000..1199ebade17b
+index 000000000000..9e7cd66d9f44
--- /dev/null
+++ b/localversion-rt
@@ -0,0 +1 @@
-+-rt16
++-rt18
diff --git a/mm/Kconfig b/mm/Kconfig
index 86e3e0e74d20..77e5862a1ed2 100644
--- a/mm/Kconfig
@@ -23711,7 +24391,7 @@ index 50b4ca6787f0..77518a3b35a1 100644
unsigned int nr_free_highpages (void)
{
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
-index 0de26691f0f5..db6fe1ba7b34 100644
+index 47559cc0cdcc..1f2ebc924916 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -67,6 +67,7 @@
@@ -23809,7 +24489,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
put_online_cpus();
mutex_unlock(&percpu_charge_mutex);
}
-@@ -4553,12 +4557,12 @@ static int mem_cgroup_move_account(struct page *page,
+@@ -4555,12 +4559,12 @@ static int mem_cgroup_move_account(struct page *page,
ret = 0;
@@ -23824,7 +24504,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
out_unlock:
unlock_page(page);
out:
-@@ -5433,10 +5437,10 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
+@@ -5435,10 +5439,10 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
commit_charge(page, memcg, lrucare);
@@ -23837,7 +24517,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
if (do_memsw_account() && PageSwapCache(page)) {
swp_entry_t entry = { .val = page_private(page) };
-@@ -5492,14 +5496,14 @@ static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
+@@ -5494,14 +5498,14 @@ static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
memcg_oom_recover(memcg);
}
@@ -23854,7 +24534,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
if (!mem_cgroup_is_root(memcg))
css_put_many(&memcg->css, nr_pages);
-@@ -5654,10 +5658,10 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage)
+@@ -5656,10 +5660,10 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage)
commit_charge(newpage, memcg, false);
@@ -23867,7 +24547,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
}
DEFINE_STATIC_KEY_FALSE(memcg_sockets_enabled_key);
-@@ -5837,6 +5841,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+@@ -5850,6 +5854,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
{
struct mem_cgroup *memcg, *swap_memcg;
unsigned short oldid;
@@ -23875,7 +24555,7 @@ index 0de26691f0f5..db6fe1ba7b34 100644
VM_BUG_ON_PAGE(PageLRU(page), page);
VM_BUG_ON_PAGE(page_count(page), page);
-@@ -5877,12 +5882,16 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+@@ -5890,12 +5895,16 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
* important here to have the interrupts disabled because it is the
* only synchronisation we have for udpating the per-CPU variables.
*/
@@ -23913,7 +24593,7 @@ index 6f4d27c5bb32..5cd25c745a8f 100644
#ifdef finish_arch_post_lock_switch
finish_arch_post_lock_switch();
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
-index 1460e6ad5e14..dc4eac895340 100644
+index e5b159b88e39..b9946dcb1099 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -61,6 +61,7 @@
@@ -25160,7 +25840,7 @@ index 604f26a4f696..312006d2db50 100644
void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
diff --git a/mm/workingset.c b/mm/workingset.c
-index 33f6f4db32fd..f4ff55f4b60e 100644
+index 4c4f05655e6e..b97b1e87b54c 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -334,7 +334,8 @@ void workingset_activation(struct page *page)
@@ -25216,8 +25896,8 @@ index 33f6f4db32fd..f4ff55f4b60e 100644
pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n",
timestamp_bits, max_order, bucket_order);
-- ret = list_lru_init_key(&workingset_shadow_nodes, &shadow_nodes_key);
-+ ret = list_lru_init_key(&__workingset_shadow_nodes, &shadow_nodes_key);
+- ret = __list_lru_init(&workingset_shadow_nodes, true, &shadow_nodes_key);
++ ret = __list_lru_init(&__workingset_shadow_nodes, true, &shadow_nodes_key);
if (ret)
goto err;
ret = register_shrinker(&workingset_shadow_shrinker);
@@ -25231,7 +25911,7 @@ index 33f6f4db32fd..f4ff55f4b60e 100644
return ret;
}
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
-index b0bc023d25c5..5af6426fbcbe 100644
+index 1689bb58e0d1..e52a8cb6aa5a 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -53,6 +53,7 @@
@@ -25863,7 +26543,7 @@ index 508e051304fb..bc3b17b78c94 100644
struct gnet_stats_basic_cpu __percpu *cpu,
struct gnet_stats_basic_packed *b)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
-index f0f462c0573d..3cf5ed766dcd 100644
+index fe008f1bd930..9fa6bea3dd3f 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -64,6 +64,7 @@
@@ -26198,10 +26878,10 @@ index 6988566dc72f..672fffcde28c 100644
static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
-index a697ddf56334..f1867acd0e81 100644
+index acaaf616da71..09020dbcc089 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
-@@ -4180,7 +4180,7 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
+@@ -4230,7 +4230,7 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
struct ieee80211_supported_band *sband;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
@@ -26234,7 +26914,7 @@ index 004af030ef1a..b64f751bda45 100644
const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO] __read_mostly;
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
-index f2b04a77258d..7d841bcae677 100644
+index cb76ff3088e9..3f42c5b1af55 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -63,6 +63,7 @@
================================================================
---- gitweb:
http://git.pld-linux.org/gitweb.cgi/packages/kernel.git/commitdiff/7c18450abfab466e4ad31cd3724bfc5ac985ec4c
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