locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations
authorWill Deacon <will.deacon@arm.com>
Thu, 6 Aug 2015 16:54:44 +0000 (17:54 +0100)
committerIngo Molnar <mingo@kernel.org>
Wed, 12 Aug 2015 09:59:10 +0000 (11:59 +0200)
commit0ca326de7aa9cb253db9c1a3eb3f0487c8dbf912
tree2964ef144f8b873c9af610577b4e3c92c0af9ac8
parentcd074aea9261784e44f292e1132830ec221802c6
locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations

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>
arch/arm/include/asm/atomic.h
arch/arm/include/asm/cmpxchg.h