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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-07-25 13:59:46 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-25 14:53:52 -0400 |
| commit | 5f00bcb38ef9a980a33c6dbdc0044964b05f22dd (patch) | |
| tree | 3175fb9375aecb50bde1be0bf4fa8aa8155131d6 /include/linux/atomic.h | |
| parent | 34006cee28f7344f9557a4be3816c7891b1bbab1 (diff) | |
| parent | b6844e8f64920cdee620157252169ba63afb0c89 (diff) | |
Merge branch 'master' into devel and apply fixup from Stephen Rothwell:
vfs/nfs: fixup for nfs_open_context change
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/atomic.h')
| -rw-r--r-- | include/linux/atomic.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h index ee456c79b0e..bc6615d4132 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -34,6 +34,32 @@ static inline int atomic_inc_not_zero_hint(atomic_t *v, int hint) } #endif +#ifndef atomic_inc_unless_negative +static inline int atomic_inc_unless_negative(atomic_t *p) +{ + int v, v1; + for (v = 0; v >= 0; v = v1) { + v1 = atomic_cmpxchg(p, v, v + 1); + if (likely(v1 == v)) + return 1; + } + return 0; +} +#endif + +#ifndef atomic_dec_unless_positive +static inline int atomic_dec_unless_positive(atomic_t *p) +{ + int v, v1; + for (v = 0; v <= 0; v = v1) { + v1 = atomic_cmpxchg(p, v, v - 1); + if (likely(v1 == v)) + return 1; + } + return 0; +} +#endif + #ifndef CONFIG_ARCH_HAS_ATOMIC_OR static inline void atomic_or(int i, atomic_t *v) { |