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(parent: 83a6783) | patch
arm64: rwsem: use asm-generic rwsem implementation
authorWill Deacon <will.deacon@arm.com>
Fri, 14 Mar 2014 17:47:05 +0000 (17:47 +0000)
committerMark Brown <broonie@linaro.org>
Wed, 21 May 2014 17:58:47 +0000 (18:58 +0100)
commitaf6b38abb48ee39ae743dcbd0c3425af0bbaa2ee
treece09c4e121656981316dd1fea07da1253f3ae089tree | snapshot
parent83a6783cbe03e736f3c66e1d1de2a0d360e82821commit | diff
arm64: rwsem: use asm-generic rwsem implementation

asm-generic offers an atomic-add based rwsem implementation, which
can avoid the need for heavier, spinlock-based synchronisation on the
fast path.

This patch makes use of the optimised implementation for arm64 CPUs.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit c209f79940ac0c75ae8d2f503a2b9d86255e266c)
Signed-off-by: Mark Brown <broonie@linaro.org>
arch/arm64/Kconfig diff | blob | history
arch/arm64/include/asm/Kbuild diff | blob | history
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