forked from Minki/linux
[ARM SMP] Clear the exclusive monitor on ARMv6 CPUs on context switch
Ensure that the exclusive monitor is cleared on context switch with ARMv6 CPUs. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -533,6 +533,13 @@ ENTRY(__switch_to)
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ldr r3, [r2, #TI_TP_VALUE]
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stmia ip!, {r4 - sl, fp, sp, lr} @ Store most regs on stack
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ldr r6, [r2, #TI_CPU_DOMAIN]!
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#if __LINUX_ARM_ARCH__ >= 6
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#ifdef CONFIG_CPU_MPCORE
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clrex
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#else
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strex r3, r4, [ip] @ Clear exclusive monitor
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#endif
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#endif
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#if defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_IWMMXT)
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mra r4, r5, acc0
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stmia ip, {r4, r5}
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