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| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-02 09:41:56 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-02 09:41:56 -0400 |
| commit | 29c798fecb9b846b363b0a02fa662ff42fc19426 (patch) | |
| tree | e708d6aca8f098e69571780f702325b221b66694 /include/linux/jump_label_ref.h | |
| parent | ASoC: fix the building issue of missing codec field in 'struct snd_soc_card' (diff) | |
| parent | Linux 2.6.37-rc1 (diff) | |
| download | linux-dev-29c798fecb9b846b363b0a02fa662ff42fc19426.tar.xz linux-dev-29c798fecb9b846b363b0a02fa662ff42fc19426.zip | |
Merge commit 'v2.6.37-rc1' into for-2.6.37
Diffstat (limited to 'include/linux/jump_label_ref.h')
| -rw-r--r-- | include/linux/jump_label_ref.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/linux/jump_label_ref.h b/include/linux/jump_label_ref.h new file mode 100644 index 000000000000..e5d012ad92c6 --- /dev/null +++ b/include/linux/jump_label_ref.h @@ -0,0 +1,44 @@ +#ifndef _LINUX_JUMP_LABEL_REF_H +#define _LINUX_JUMP_LABEL_REF_H + +#include <linux/jump_label.h> +#include <asm/atomic.h> + +#ifdef HAVE_JUMP_LABEL + +static inline void jump_label_inc(atomic_t *key) +{ + if (atomic_add_return(1, key) == 1) + jump_label_enable(key); +} + +static inline void jump_label_dec(atomic_t *key) +{ + if (atomic_dec_and_test(key)) + jump_label_disable(key); +} + +#else /* !HAVE_JUMP_LABEL */ + +static inline void jump_label_inc(atomic_t *key) +{ + atomic_inc(key); +} + +static inline void jump_label_dec(atomic_t *key) +{ + atomic_dec(key); +} + +#undef JUMP_LABEL +#define JUMP_LABEL(key, label) \ +do { \ + if (unlikely(__builtin_choose_expr( \ + __builtin_types_compatible_p(typeof(key), atomic_t *), \ + atomic_read((atomic_t *)(key)), *(key)))) \ + goto label; \ +} while (0) + +#endif /* HAVE_JUMP_LABEL */ + +#endif /* _LINUX_JUMP_LABEL_REF_H */ |