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| author | Len Brown <len.brown@intel.com> | 2005-12-06 23:31:30 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-12-06 23:31:30 +0100 |
| commit | 3d5271f9883cba7b54762bc4fe027d4172f06db7 (patch) | |
| tree | ab8a881a14478598a0c8bda0d26c62cdccfffd6d /include/asm-arm26/atomic.h | |
| parent | [ACPI] 8250_acpi.c buildfix (diff) | |
| parent | Auto-update from upstream (diff) | |
| download | linux-3d5271f9883cba7b54762bc4fe027d4172f06db7.tar.xz linux-3d5271f9883cba7b54762bc4fe027d4172f06db7.zip | |
Pull release into acpica branch
Diffstat (limited to 'include/asm-arm26/atomic.h')
| -rw-r--r-- | include/asm-arm26/atomic.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/asm-arm26/atomic.h b/include/asm-arm26/atomic.h index 4a88235c0e76..a47cadc59686 100644 --- a/include/asm-arm26/atomic.h +++ b/include/asm-arm26/atomic.h @@ -62,6 +62,35 @@ static inline int atomic_sub_return(int i, atomic_t *v) return val; } +static inline int atomic_cmpxchg(atomic_t *v, int old, int new) +{ + int ret; + unsigned long flags; + + local_irq_save(flags); + ret = v->counter; + if (likely(ret == old)) + v->counter = new; + local_irq_restore(flags); + + return ret; +} + +static inline int atomic_add_unless(atomic_t *v, int a, int u) +{ + int ret; + unsigned long flags; + + local_irq_save(flags); + ret = v->counter; + if (ret != u) + v->counter += a; + local_irq_restore(flags); + + return ret != u; +} +#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) + static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) { unsigned long flags; |