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ARM: 7811/1: locks: use early clobber in arch_spin_trylock
authorWill Deacon <will.deacon@arm.com>
Mon, 12 Aug 2013 17:03:26 +0000 (18:03 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Tue, 13 Aug 2013 19:22:43 +0000 (20:22 +0100)
commitafa31d8eb86fc2f25083e675d57ac8173a98f999
treeb266adc9aebcda0a7eccd7adbd07a4a5aab3ceeetree
parente35ac62d2202e31307c0f9b278a61e484c4727f2commit | diff
ARM: 7811/1: locks: use early clobber in arch_spin_trylock

The res variable is written before we've finished with the input
operands (namely the lock address), so ensure that we mark it as `early
clobber' to avoid unintended register sharing.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/include/asm/spinlock.h diff | blob | history
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