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ARM: 8047/1: rwsem: use asm-generic rwsem implementation
authorWill Deacon <will.deacon@arm.com>
Fri, 2 May 2014 16:06:19 +0000 (17:06 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Fri, 30 May 2014 00:12:25 +0000 (01:12 +0100)
commit767efb54d47c7700b0cd837af8b467f18709d3db
tree28495f7a7994a61dca067b9d7fa1e8f2eb6e314ctree | snapshot
parente3f4388812057ba587ab4ecf10d8bf33474cfae7commit | diff
ARM: 8047/1: 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 ARM CPUs.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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