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ARM: 8047/1: rwsem: use asm-generic rwsem implementation

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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>
This commit is contained in:
Will Deacon 2014-05-02 17:06:19 +01:00 committed by Russell King
parent 03eff46ce3
commit 8a87411b64
2 changed files with 2 additions and 4 deletions
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5
arch/arm/Kconfig
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@ -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

1
arch/arm/include/asm/Kbuild
View file

@ -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