| Date | Tue, 17 Aug 2021 20:14:31 -0000 | From | "tip-bot2 for Thomas Gleixner" <> | Subject | [tip: locking/core] locking/rtmutex: Switch to from cmpxchg_*() to try_cmpxchg_*() |
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The following commit has been merged into the locking/core branch of tip:
Commit-ID: 709e0b62869f625afd18edd79f190c38cb39dfb2 Gitweb: https://git.kernel.org/tip/709e0b62869f625afd18edd79f190c38cb39dfb2 Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Sun, 15 Aug 2021 23:27:55 +02:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Tue, 17 Aug 2021 17:01:47 +02:00
locking/rtmutex: Switch to from cmpxchg_*() to try_cmpxchg_*()
Allows the compiler to generate better code depending on the architecture.
Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210815211302.668958502@linutronix.de --- kernel/locking/rtmutex.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 5187add..98f06c5 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -145,14 +145,14 @@ static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex *lock, struct task_struct *old, struct task_struct *new) { - return cmpxchg_acquire(&lock->owner, old, new) == old; + return try_cmpxchg_acquire(&lock->owner, &old, new); } static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex *lock, struct task_struct *old, struct task_struct *new) { - return cmpxchg_release(&lock->owner, old, new) == old; + return try_cmpxchg_release(&lock->owner, &old, new); } /*
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