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| author | Will Deacon <will.deacon@arm.com> | 2014-02-17 14:13:28 +0000 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-09-13 13:23:08 +0200 |
| commit | 57be265a1b3034673e481d00e27b72c93b073d13 (patch) | |
| tree | 4e3d1dbea78a0fdfc72fef0028d4a078a5ab8a6b | |
| parent | b0d56e6c90efeec41cfbce97b973d4516d5db0a3 (diff) | |
| download | android_kernel_m2note-57be265a1b3034673e481d00e27b72c93b073d13.tar.gz | |
ARM: 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>
| -rw-r--r-- | arch/arm/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/include/asm/Kbuild | 1 |
2 files changed, 2 insertions, 4 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f6de5b921..055591397 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -159,12 +159,9 @@ config TRACE_IRQFLAGS_SUPPORT bool default y -config RWSEM_GENERIC_SPINLOCK - bool - default y - config RWSEM_XCHGADD_ALGORITHM bool + default y config ARCH_HAS_ILOG2_U32 bool diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index 9b0610b4d..e27ca6b2e 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -18,6 +18,7 @@ generic-y += param.h generic-y += parport.h generic-y += poll.h generic-y += resource.h +generic-y += rwsem.h generic-y += sections.h generic-y += segment.h generic-y += sembuf.h |