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Viewing changes to include/linux/jump_label_ref.h

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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include/linux/jump_label_ref.h
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#ifndef _LINUX_JUMP_LABEL_REF_H
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#define _LINUX_JUMP_LABEL_REF_H
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#include <linux/jump_label.h>
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#include <asm/atomic.h>
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#ifdef HAVE_JUMP_LABEL
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static inline void jump_label_inc(atomic_t *key)
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{
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        if (atomic_add_return(1, key) == 1)
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                jump_label_enable(key);
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}
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static inline void jump_label_dec(atomic_t *key)
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{
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        if (atomic_dec_and_test(key))
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                jump_label_disable(key);
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}
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#else /* !HAVE_JUMP_LABEL */
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static inline void jump_label_inc(atomic_t *key)
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{
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        atomic_inc(key);
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}
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static inline void jump_label_dec(atomic_t *key)
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{
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        atomic_dec(key);
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}
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#undef JUMP_LABEL
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#define JUMP_LABEL(key, label)                                          \
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do {                                                                    \
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        if (unlikely(__builtin_choose_expr(                             \
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              __builtin_types_compatible_p(typeof(key), atomic_t *),    \
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              atomic_read((atomic_t *)(key)), *(key))))                 \
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                goto label;                                             \
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} while (0)
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#endif /* HAVE_JUMP_LABEL */
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#endif /* _LINUX_JUMP_LABEL_REF_H */