tree 0e0eb1fd53d58310e2b5c7c33ab4c1711b0e9db6
parent 5c12a6eff6ae3ed32f1c4d6458e58e6c4e9b2352
author Paul Burton <paul.burton@mips.com> 1569966793 +0000
committer Paul Burton <paul.burton@mips.com> 1570466542 -0700
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MIPS: barrier: Clean up __sync() definition

Implement __sync() using the new __SYNC() infrastructure, which will
take care of not emitting an instruction for old R3k CPUs that don't
support it. The only behavioral difference is that __sync() will now
provide a compiler barrier on these old CPUs, but that seems like
reasonable behavior anyway.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-kernel@vger.kernel.org