Commit 2c3a0540 authored by Catalin Marinas's avatar Catalin Marinas Committed by Russell King

[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: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 487fd4eb
...@@ -20,6 +20,11 @@ ...@@ -20,6 +20,11 @@
*/ */
.align 5 .align 5
ENTRY(v6_early_abort) 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, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR mrc p15, 0, r0, c6, c0, 0 @ get FAR
/* /*
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment