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1#ifndef __ASM_SH_CMPXCHG_IRQ_H
2#define __ASM_SH_CMPXCHG_IRQ_H
3
4#include <linux/irqflags.h>
5
6static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
7{
8 unsigned long flags, retval;
9
10 local_irq_save(flags);
11 retval = *m;
12 *m = val;
13 local_irq_restore(flags);
14 return retval;
15}
16
17static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
18{
19 unsigned long flags, retval;
20
21 local_irq_save(flags);
22 retval = *m;
23 *m = val & 0xff;
24 local_irq_restore(flags);
25 return retval;
26}
27
28static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
29 unsigned long new)
30{
31 __u32 retval;
32 unsigned long flags;
33
34 local_irq_save(flags);
35 retval = *m;
36 if (retval == old)
37 *m = new;
38 local_irq_restore(flags); /* implies memory barrier */
39 return retval;
40}
41
42#endif /* __ASM_SH_CMPXCHG_IRQ_H */