From: Will Deacon Date: Fri, 14 Mar 2014 17:47:05 +0000 (+0000) Subject: arm64: rwsem: use asm-generic rwsem implementation X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c209f79940ac0c75ae8d2f503a2b9d86255e266c;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 Signed-off-by: Catalin Marinas --- 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