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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-08-10 15:52:52 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-08-10 15:52:52 +0200 |
| commit | b876386ee47e3ac9375a36e9107b8bd32e0599fc (patch) | |
| tree | 9bd30de345a0bf8260db1e3edbb657dc46bbe1e9 /arch/arm/kernel | |
| parent | [ARM SMP] Only enable V6K instructions on V6 MP core CPUs (diff) | |
| download | linux-b876386ee47e3ac9375a36e9107b8bd32e0599fc.tar.xz linux-b876386ee47e3ac9375a36e9107b8bd32e0599fc.zip | |
[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>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 39a6c1b0b9a3..7152bfbee581 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -533,6 +533,13 @@ ENTRY(__switch_to) ldr r3, [r2, #TI_TP_VALUE] stmia ip!, {r4 - sl, fp, sp, lr} @ Store most regs on stack ldr r6, [r2, #TI_CPU_DOMAIN]! +#if __LINUX_ARM_ARCH__ >= 6 +#ifdef CONFIG_CPU_MPCORE + clrex +#else + strex r3, r4, [ip] @ Clear exclusive monitor +#endif +#endif #if defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_IWMMXT) mra r4, r5, acc0 stmia ip, {r4, r5} |