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| author | Mark Salter <msalter@redhat.com> | 2013-04-09 15:35:46 -0400 |
|---|---|---|
| committer | Mark Salter <msalter@redhat.com> | 2013-04-09 15:35:46 -0400 |
| commit | f934af05cb1bf20558542185299394a69060b829 (patch) | |
| tree | c1d2c18ae43895bcec30e25411b2c2e5bf2dbe5e /arch/c6x | |
| parent | 31880c37c11e28cb81c70757e38392b42e695dc6 (diff) | |
| download | linux-stable-f934af05cb1bf20558542185299394a69060b829.tar.gz linux-stable-f934af05cb1bf20558542185299394a69060b829.tar.bz2 linux-stable-f934af05cb1bf20558542185299394a69060b829.zip | |
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.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h index cf78e09e18c3..2c71d5634ec2 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 */ |