Will Deacon 4e39715f4b arm64: cmpxchg: avoid memory barrier on comparison failure ...

cmpxchg doesn't require memory barrier semantics when the value
comparison fails, so make the barrier conditional on success.

Reviewed-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

2015-07-27 15:28:52 +01:00

..

asm

arm64: cmpxchg: avoid memory barrier on comparison failure

2015-07-27 15:28:52 +01:00

uapi/asm

arm64: elf: advertise 8.1 atomic instructions as new hwcap

2015-07-27 14:34:39 +01:00