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| author | Peter Zijlstra <peterz@infradead.org> | 2016-05-18 12:42:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:35 +0200 |
| commit | 86a3b5f34fc1fb307abef4fde76bebd3edce0324 (patch) | |
| tree | 4759a14c987724495da3a79b257ccfd321d0c206 /kernel/locking | |
| parent | f9852b74bec0117b888da39d070c323ea1cb7f4c (diff) | |
| download | linux-86a3b5f34fc1fb307abef4fde76bebd3edce0324.tar.bz2 | |
locking/atomic, arch/rwsem: Employ atomic_long_fetch_add()
Now that we have fetch_add() we can stop using add_return() - val.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jason Low <jason.low2@hpe.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <waiman.long@hpe.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/rwsem-xadd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 2031281bb940..447e08de1fab 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -153,7 +153,7 @@ __rwsem_mark_wake(struct rw_semaphore *sem, if (wake_type != RWSEM_WAKE_READ_OWNED) { adjustment = RWSEM_ACTIVE_READ_BIAS; try_reader_grant: - oldcount = atomic_long_add_return(adjustment, &sem->count) - adjustment; + oldcount = atomic_long_fetch_add(adjustment, &sem->count); if (unlikely(oldcount < RWSEM_WAITING_BIAS)) { /* |