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authorWill Deacon <will.deacon@arm.com>2014-03-14 17:47:05 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2014-03-14 18:02:09 +0000
commitc209f79940ac0c75ae8d2f503a2b9d86255e266c (patch)
tree206ccdfb1d2afcaffc1e662fc6e487cd6a26a597 /arch/arm64/Kconfig
parentasm-generic: rwsem: de-PPCify rwsem.h (diff)
downloadlinux-dev-c209f79940ac0c75ae8d2f503a2b9d86255e266c.tar.xz
linux-dev-c209f79940ac0c75ae8d2f503a2b9d86255e266c.zip
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>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 8cabe36e285c..4723fc14cf2d 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -77,7 +77,7 @@ config LOCKDEP_SUPPORT
config TRACE_IRQFLAGS_SUPPORT
def_bool y
-config RWSEM_GENERIC_SPINLOCK
+config RWSEM_XCHGADD_ALGORITHM
def_bool y
config GENERIC_HWEIGHT