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[ARM] 2943/1: Clear the exclusive monitor in v6_early_abort

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Patch from Catalin Marinas

Data abort caused by ldrex/strex can leave the exclusive monitor in an
unpredictable state. It is recommended that a clrex/strex is performed to
clear this state.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas 2005-10-02 22:34:35 +01:00 committed by Russell King
parent 487fd4eb14
commit 2c3a054099
1 changed files with 5 additions and 0 deletions
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5
arch/arm/mm/abort-ev6.S
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@ -20,6 +20,11 @@
*/
.align 5
ENTRY(v6_early_abort)
#ifdef CONFIG_CPU_MPCORE
clrex
#else
strex r0, r1, [sp] @ Clear the exclusive monitor
#endif
mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR
/*