John Stultz 0c54a73f29 locking/rwsem: Add __always_inline annotation to __down_write_common() and inlined callers ... [ Upstream commit e81859fe64 ] Apparently despite it being marked inline, the compiler may not inline __down_write_common() which makes it difficult to identify the cause of lock contention, as the wchan of the blocked function will always be listed as __down_write_common(). So add __always_inline annotation to the common function (as well as the inlined helper callers) to force it to be inlined so a more useful blocking function will be listed (via wchan). This mirrors commit 92cc5d00a4 ("locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers") which did the same for __down_read_common. I sort of worry that I'm playing wack-a-mole here, and talking with compiler people, they tell me inline means nothing, which makes me want to cry a little. So I'm wondering if we need to replace all the inlines with __always_inline, or remove them because either we mean something by it, or not. Fixes: c995e638cc ("locking/rwsem: Fold __down_{read,write}*()") Reported-by: Tim Murray <timmurray@google.com> Signed-off-by: John Stultz <jstultz@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Waiman Long <longman@redhat.com> Link: https://lkml.kernel.org/r/20240709060831.495366-1-jstultz@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-19 05:44:59 +02:00
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irqflag-debug.c
lock_events_list.h
lock_events.c
lock_events.h
lockdep_internals.h	locking/lockdep: Iterate lock_classes directly when reading lockdep files	2022-04-08 14:23:57 +02:00
lockdep_proc.c	locking/lockdep: Iterate lock_classes directly when reading lockdep files	2022-04-08 14:23:57 +02:00
lockdep_states.h
lockdep.c	lockdep: Fix block chain corruption	2023-12-03 07:31:23 +01:00
locktorture.c
Makefile
mcs_spinlock.h
mutex-debug.c	locking/mutex: Introduce devm_mutex_init()	2024-07-18 13:07:26 +02:00
mutex.c
mutex.h
osq_lock.c
percpu-rwsem.c
qrwlock.c
qspinlock_paravirt.h
qspinlock_stat.h
qspinlock.c
rtmutex_api.c	locking/rtmutex: Fix task->pi_waiters integrity	2023-08-03 10:22:45 +02:00
rtmutex_common.h	locking/rtmutex: Fix task->pi_waiters integrity	2023-08-03 10:22:45 +02:00
rtmutex.c	locking/rtmutex: Fix task->pi_waiters integrity	2023-08-03 10:22:45 +02:00
rwbase_rt.c
rwsem.c	locking/rwsem: Add __always_inline annotation to __down_write_common() and inlined callers	2024-08-19 05:44:59 +02:00
semaphore.c
spinlock_debug.c
spinlock_rt.c
spinlock.c
test-ww_mutex.c	locking/ww_mutex/test: Fix potential workqueue corruption	2023-11-28 16:56:15 +00:00
ww_mutex.h	locking/rtmutex: Fix task->pi_waiters integrity	2023-08-03 10:22:45 +02:00
ww_rt_mutex.c