1#ifndef _ASM_SCORE_CMPXCHG_H
2#define _ASM_SCORE_CMPXCHG_H
3
4#include <linux/irqflags.h>
5
6struct __xchg_dummy { unsigned long a[100]; };
7#define __xg(x) ((struct __xchg_dummy *)(x))
8
9static inline
10unsigned long __xchg(volatile unsigned long *m, unsigned long val)
11{
12	unsigned long retval;
13	unsigned long flags;
14
15	local_irq_save(flags);
16	retval = *m;
17	*m = val;
18	local_irq_restore(flags);
19	return retval;
20}
21
22#define xchg(ptr, v)						\
23	((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr),	\
24					(unsigned long)(v)))
25
26static inline unsigned long __cmpxchg(volatile unsigned long *m,
27				unsigned long old, unsigned long new)
28{
29	unsigned long retval;
30	unsigned long flags;
31
32	local_irq_save(flags);
33	retval = *m;
34	if (retval == old)
35		*m = new;
36	local_irq_restore(flags);
37	return retval;
38}
39
40#define cmpxchg(ptr, o, n)					\
41	((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr),	\
42					(unsigned long)(o),	\
43					(unsigned long)(n)))
44
45#define __HAVE_ARCH_CMPXCHG	1
46
47#include <asm-generic/cmpxchg-local.h>
48
49#endif /* _ASM_SCORE_CMPXCHG_H */
50