45 lines
878 B
C
45 lines
878 B
C
#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 */
|