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ARM: bitops: switch set/clear/change bitops to use ldrex/strex

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Switch the set/clear/change bitops to use the word-based exclusive
operations, which are only present in a wider range of ARM architectures
than the byte-based exclusive operations.

Tested record:
- Nicolas Pitre: ext3,rw,le
- Sourav Poddar: nfs,le
- Will Deacon: ext3,rw,le
- Tony Lindgren: ext3+nfs,le

Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2011-01-16 18:02:17 +00:00
parent a16ede35a2
commit 6323f0cced
9 changed files with 63 additions and 112 deletions
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9
arch/arm/lib/testchangebit.S
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@@ -12,9 +12,6 @@
#include "bitops.h"
.text
ENTRY(_test_and_change_bit_be)
eor r0, r0, #0x18 @ big endian byte ordering
ENTRY(_test_and_change_bit_le)
testop eor, strb
ENDPROC(_test_and_change_bit_be)
ENDPROC(_test_and_change_bit_le)
ENTRY(_test_and_change_bit)
testop eor, str
ENDPROC(_test_and_change_bit)