tree a99817f99077f273efd34d87c082958768ba91bf
parent e8f3010f7326c00368dbc057bd052bec80dfc072
author Will Deacon <will.deacon@arm.com> 1444331718 +0100
committer Catalin Marinas <catalin.marinas@arm.com> 1444667818 +0100

arm64: atomics: implement native {relaxed, acquire, release} atomics

Commit 654672d4ba1a ("locking/atomics: Add _{acquire|release|relaxed}()
variants of some atomic operation") introduced a relaxed atomic API to
Linux that maps nicely onto the arm64 memory model, including the new
ARMv8.1 atomic instructions.

This patch hooks up the API to our relaxed atomic instructions, rather
than have them all expand to the full-barrier variants as they do
currently.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>