commit 8a87411b649c6082aebea613e84dcb3f174f72fb
author Will Deacon <will.deacon@arm.com> Fri May 02 17:06:19 2014 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> Fri May 30 01:12:25 2014 +0100
tree 28495f7a7994a61dca067b9d7fa1e8f2eb6e314c
parent 03eff46ce31dbb186fea3eb2016e1c41f000db7e

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>

arch/arm/Kconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5850617..ce64b7f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -165,12 +165,9 @@
 	bool
 	default y
 
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
 config RWSEM_XCHGADD_ALGORITHM
 	bool
+	default y
 
 config ARCH_HAS_ILOG2_U32
 	bool