Commit 2c3a0540 authored Oct 02, 2005 by Catalin Marinas Committed by Russell King Oct 02, 2005

[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>

parent 487fd4eb

arch/arm/mm/abort-ev6.S

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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
	/*		/*