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4e39715f4b
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> |
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