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| author | Catalin Marinas <catalin.marinas@arm.com> | 2005-10-02 22:34:35 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-10-02 22:34:35 +0100 |
| commit | 2c3a0540999ac9bd7147fb98833224a58cdaf217 (patch) | |
| tree | 85fe67c8a02c5e7b90f9ceb2330c0e6b8d1f6b7d | |
| parent | 487fd4eb1445407c9760af08b0b34c3f4cdb4afc (diff) | |
| download | op-kernel-dev-2c3a0540999ac9bd7147fb98833224a58cdaf217.zip op-kernel-dev-2c3a0540999ac9bd7147fb98833224a58cdaf217.tar.gz | |
[ARM] 2943/1: Clear the exclusive monitor in v6_early_abort
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>
| -rw-r--r-- | arch/arm/mm/abort-ev6.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S index 8f76f3d..dbd3460 100644 --- a/arch/arm/mm/abort-ev6.S +++ b/arch/arm/mm/abort-ev6.S @@ -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 /* |
