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[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>
Catalin Marinas 20 năm trước cách đây
mục cha
commit
2c3a054099
1 tập tin đã thay đổi với 5 bổ sung0 xóa
  1. 5 0
      arch/arm/mm/abort-ev6.S

+ 5 - 0
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
 /*