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| author | Will Deacon <will.deacon@arm.com> | 2014-03-14 21:47:05 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-03-14 22:02:09 +0400 |
| commit | c209f79940ac0c75ae8d2f503a2b9d86255e266c (patch) | |
| tree | 206ccdfb1d2afcaffc1e662fc6e487cd6a26a597 /arch/arm64 | |
| parent | e172800e5d3162f97d332b3745e3743ce150ec48 (diff) | |
| download | linux-c209f79940ac0c75ae8d2f503a2b9d86255e266c.tar.xz | |
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')
| -rw-r--r-- | arch/arm64/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/Kbuild | 1 |
2 files changed, 2 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 diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild index 71c53ecfcc3a..41cde70943fb 100644 --- a/arch/arm64/include/asm/Kbuild +++ b/arch/arm64/include/asm/Kbuild @@ -29,6 +29,7 @@ generic-y += pci.h generic-y += poll.h generic-y += posix_types.h generic-y += resource.h +generic-y += rwsem.h generic-y += scatterlist.h generic-y += sections.h generic-y += segment.h |