locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations

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By defining our SMP atomics in terms of relaxed operations, we gain
a small reduction in code size and have acquire/release/fence variants
generated automatically by the core code.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman.Long@hp.com
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1438880084-18856-9-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Will Deacon 2015-08-06 17:54:44 +01:00 • committed by Ingo Molnar

parent cd074aea92

commit 0ca326de7a

2 changed files with 24 additions and 60 deletions

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37

arch/arm/include/asm/atomic.h

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47

arch/arm/include/asm/cmpxchg.h

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