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arm64: lockref: add support for lockless lockrefs using cmpxchg
authorWill Deacon <will.deacon@arm.com>
Wed, 9 Oct 2013 14:54:27 +0000 (15:54 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Thu, 24 Oct 2013 14:46:34 +0000 (15:46 +0100)
Our spinlocks are only 32-bit (2x16-bit tickets) and our cmpxchg can
deal with 8-bytes (as one would hope!).

This patch wires up the cmpxchg-based lockless lockref implementation
for arm64.

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

No differences found
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