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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)
commit5686b06cea34e31ec0a549d9b5ac00776e8e8d6d
tree69f5fa9d9ccc89232bea8c1e1337a4217751ba3dtree | snapshot (tar.gz zip)
parent52ea2a560a9dba57fe5fd6b4726b1089751accf2commit | diff
arm64: lockref: add support for lockless lockrefs using cmpxchg

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>
arch/arm64/Kconfig diff | blob | blame | history
arch/arm64/include/asm/spinlock.h diff | blob | blame | history