summaryrefslogtreecommitdiff
path: root/include/linux/ww_mutex.h
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2016-11-24 14:46:26 +0300
committerIngo Molnar <mingo@kernel.org>2016-12-06 12:42:03 +0300
commitf4ec57b632fe15ed7a355099cb96ed4b647416de (patch)
tree8e0c616b64f96f3a3bd75d53835de3d2275e493d /include/linux/ww_mutex.h
parent84d82ec5b9046ecdf16031d3e93a66ef50257402 (diff)
downloadlinux-f4ec57b632fe15ed7a355099cb96ed4b647416de.tar.xz
locking/ww_mutex: Use relaxed atomics
The stamp is a sequence number, we don't care about memory ordering. Signed-off-by: Peter 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: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/ww_mutex.h')
-rw-r--r--include/linux/ww_mutex.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ww_mutex.h b/include/linux/ww_mutex.h
index 2bb5deb0012e..7b0066814fa0 100644
--- a/include/linux/ww_mutex.h
+++ b/include/linux/ww_mutex.h
@@ -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;