1#ifndef _COMPAT_LINUX_ATOMIC_H
2#define _COMPAT_LINUX_ATOMIC_H 1
3
4/*
5#include <linux/version.h>
6
7#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36))
8#include_next <linux/atomic.h>
9#else
10*/
11
12#include <asm/atomic.h>
13
14/* Shahar Klein: atomic_inc_not_zero_hint do we need it? */
15#if 0
16
17/**
18 * atomic_inc_not_zero_hint - increment if not null
19 * @v: pointer of type atomic_t
20 * @hint: probable value of the atomic before the increment
21 *
22 * This version of atomic_inc_not_zero() gives a hint of probable
23 * value of the atomic. This helps processor to not read the memory
24 * before doing the atomic read/modify/write cycle, lowering
25 * number of bus transactions on some arches.
26 *
27 * Returns: 0 if increment was not done, 1 otherwise.
28 */
29
30#ifndef atomic_inc_not_zero_hint
31static inline int atomic_inc_not_zero_hint(atomic_t *v, int hint)
32{
33	int val, c = hint;
34
35	/* sanity test, should be removed by compiler if hint is a constant */
36	if (!hint)
37		return atomic_inc_not_zero(v);
38
39	do {
40		val = atomic_cmpxchg(v, c, c + 1);
41		if (val == c)
42			return 1;
43		c = val;
44	} while (c);
45
46	return 0;
47}
48#endif
49#endif
50
51//#endif /* (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)) */
52
53#endif	/* _COMPAT_LINUX_ATOMIC_H */
54