| commit | c342f78217e822d2178265b0b1de232eeb717149 | [log] [tgz] |
|---|---|---|
| author | Will Deacon <will.deacon@arm.com> | Thu Apr 23 20:08:49 2015 +0100 |
| committer | Will Deacon <will.deacon@arm.com> | Mon Jul 27 15:28:51 2015 +0100 |
| tree | 2c1de7284bb6671aa9cb4e8a0f85a119d64de3a2 | |
| parent | c8366ba0fb65063b6b4f69c7af1ea74152435590 [diff] |
arm64: cmpxchg: patch in lse instructions when supported by the CPU On CPUs which support the LSE atomic instructions introduced in ARMv8.1, it makes sense to use them in preference to ll/sc sequences. This patch introduces runtime patching of our cmpxchg primitives so that the LSE cas instruction is used instead. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>