locking/qrwlock: Implement queue_write_unlock() using smp_store_release()

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Since the following commit:

  536fa40222 ("compiler: Allow 1- and 2-byte smp_load_acquire() and smp_store_release()")

smp_store_release() supports byte accesses, so use that in writer unlock
and remove the conditional macro override.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Waiman Long <Waiman.Long@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1438880084-18856-6-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

This commit is contained in:

Will Deacon 2015-08-06 17:54:41 +01:00 • committed by Ingo Molnar

parent f5468ffde1

commit 2b2a85a4d3

2 changed files with 1 additions and 18 deletions

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9

include/asm-generic/qrwlock.h

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