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Commit f4ec57b6 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

locking/ww_mutex: Use relaxed atomics 



The stamp is a sequence number, we don't care about memory ordering.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 84d82ec5

include/linux/ww_mutex.h

+1 −1
Original line number Diff line number Diff line
@@ -120,7 +120,7 @@ static inline void ww_acquire_init(struct ww_acquire_ctx *ctx, 
				   struct ww_class *ww_class)

{

	ctx->task = current;

	ctx->stamp = atomic_long_inc_return(&ww_class->stamp);

	ctx->stamp = atomic_long_inc_return_relaxed(&ww_class->stamp);

	ctx->acquired = 0;

#ifdef CONFIG_DEBUG_MUTEXES

	ctx->ww_class = ww_class;