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| author | Matt Fleming <matt@console-pimps.org> | 2009-06-13 23:23:27 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-06-14 17:31:17 +0200 |
| commit | 0c50f6f38399685d0c9ef0f5ffd6c4955e31cb26 (patch) | |
| tree | 7709bc7ab43998a08028b744ecc1a3626568bb11 /arch/sh | |
| parent | sh: Convert sh64 to use the generic checksum code. (diff) | |
| download | linux-0c50f6f38399685d0c9ef0f5ffd6c4955e31cb26.tar.xz linux-0c50f6f38399685d0c9ef0f5ffd6c4955e31cb26.zip | |
sh: Make the atomic functions safe for irqsoff tracing
The irqsoff tracer uses the atomic_* functions internally, but the
implementations of those functions in arch/sh/include/asm/atomic-irq.h
disable irqs to achieve atomicity. A continuous loop ensues where we
disable interrupts, trace the interrupt disabling, call atomic_*
functions, disable interrupts, trace the interrupt disabling, etc..
The simplest solution to all this is to just convert uses of
local_irq_save()/local_irq_restore() the raw_* equivalents because the
raw_* equivalents don't call trace_hardirqs_on()/trace_hardirqs_off().
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/include/asm/atomic-irq.h | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/sh/include/asm/atomic-irq.h b/arch/sh/include/asm/atomic-irq.h index a0b348068cae..467d9415a32e 100644 --- a/arch/sh/include/asm/atomic-irq.h +++ b/arch/sh/include/asm/atomic-irq.h @@ -10,29 +10,29 @@ static inline void atomic_add(int i, atomic_t *v) { unsigned long flags; - local_irq_save(flags); + raw_local_irq_save(flags); v->counter += i; - local_irq_restore(flags); + raw_local_irq_restore(flags); } static inline void atomic_sub(int i, atomic_t *v) { unsigned long flags; - local_irq_save(flags); + raw_local_irq_save(flags); v->counter -= i; - local_irq_restore(flags); + raw_local_irq_restore(flags); } static inline int atomic_add_return(int i, atomic_t *v) { unsigned long temp, flags; - local_irq_save(flags); + raw_local_irq_save(flags); temp = v->counter; temp += i; v->counter = temp; - local_irq_restore(flags); + raw_local_irq_restore(flags); return temp; } @@ -41,11 +41,11 @@ static inline int atomic_sub_return(int i, atomic_t *v) { unsigned long temp, flags; - local_irq_save(flags); + raw_local_irq_save(flags); temp = v->counter; temp -= i; v->counter = temp; - local_irq_restore(flags); + raw_local_irq_restore(flags); return temp; } @@ -54,18 +54,18 @@ static inline void atomic_clear_mask(unsigned int mask, atomic_t *v) { unsigned long flags; - local_irq_save(flags); + raw_local_irq_save(flags); v->counter &= ~mask; - local_irq_restore(flags); + raw_local_irq_restore(flags); } static inline void atomic_set_mask(unsigned int mask, atomic_t *v) { unsigned long flags; - local_irq_save(flags); + raw_local_irq_save(flags); v->counter |= mask; - local_irq_restore(flags); + raw_local_irq_restore(flags); } #endif /* __ASM_SH_ATOMIC_IRQ_H */ |