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Commit 8a87411b authored by Will Deacon's avatar Will Deacon Committed by Russell King
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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: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 03eff46c

arch/arm/Kconfig

+1 −4
Original line number Diff line number Diff line
@@ -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

arch/arm/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line
@@ -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