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authorMark Salter <msalter@redhat.com>2013-04-09 19:35:46 (GMT)
committerMark Salter <msalter@redhat.com>2013-04-09 19:35:46 (GMT)
commitf934af05cb1bf20558542185299394a69060b829 (patch)
treec1d2c18ae43895bcec30e25411b2c2e5bf2dbe5e /arch/c6x
parent31880c37c11e28cb81c70757e38392b42e695dc6 (diff)
add memory barrier to arch_local_irq_restore
arch_local_irq_save() and friends are required to act as compiler memory barriers. This patch adds a "memory" clobber to the inline asm code in arch_local_irq_restore() which is used as the building block for other functions needing to set/clear the interrupt enable in the CSR register. Signed-off-by: Mark Salter <msalter@redhat.com>
Diffstat (limited to 'arch/c6x')
-rw-r--r--arch/c6x/include/asm/irqflags.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h
index cf78e09..2c71d56 100644
--- a/arch/c6x/include/asm/irqflags.h
+++ b/arch/c6x/include/asm/irqflags.h
@@ -27,7 +27,7 @@ static inline unsigned long arch_local_save_flags(void)
/* set interrupt enabled status */
static inline void arch_local_irq_restore(unsigned long flags)
{
- asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags));
+ asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory");
}
/* unconditionally enable interrupts */

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