ia64: Fix up smp_mb__{before,after}_clear_bit()

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IA64 doesn't actually have acquire/release barriers, its a lie!

Add a comment explaining this and fix up the bitop barriers.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-akevfh136um9dqvb1ohm55ca@git.kernel.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-ia64@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

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Peter Zijlstra 2014-02-04 20:36:01 +01:00 • committed by Ingo Molnar

parent 81cef0fe19

commit e4f9bfb3fe

2 changed files with 11 additions and 5 deletions

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7

arch/ia64/include/asm/bitops.h

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9

arch/ia64/include/uapi/asm/cmpxchg.h

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