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| author | Will Deacon <will.deacon@arm.com> | 2014-05-02 17:06:19 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-05-30 01:12:25 +0100 |
| commit | 8a87411b649c6082aebea613e84dcb3f174f72fb (patch) | |
| tree | 28495f7a7994a61dca067b9d7fa1e8f2eb6e314c | |
| parent | 03eff46ce31dbb186fea3eb2016e1c41f000db7e (diff) | |
| download | blackbird-op-linux-8a87411b649c6082aebea613e84dcb3f174f72fb.tar.gz blackbird-op-linux-8a87411b649c6082aebea613e84dcb3f174f72fb.zip | |
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>
| -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 58506175a3ea..ce64b7f66328 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -165,12 +165,9 @@ 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 23e728ecf8ab..f5a357601983 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -21,6 +21,7 @@ generic-y += parport.h generic-y += poll.h generic-y += preempt.h generic-y += resource.h +generic-y += rwsem.h generic-y += sections.h generic-y += segment.h generic-y += sembuf.h |
