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>
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@ -153,7 +153,7 @@ __rwsem_mark_wake(struct rw_semaphore *sem,
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if (wake_type != RWSEM_WAKE_READ_OWNED) {
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adjustment = RWSEM_ACTIVE_READ_BIAS;
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try_reader_grant:
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oldcount = atomic_long_add_return(adjustment, &sem->count) - adjustment;
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oldcount = atomic_long_fetch_add(adjustment, &sem->count);
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if (unlikely(oldcount < RWSEM_WAITING_BIAS)) {
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/*
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