#ifndef __ASM_SH_CMPXCHG_IRQ_H | |
#define __ASM_SH_CMPXCHG_IRQ_H | |
static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) | |
{ | |
unsigned long flags, retval; | |
local_irq_save(flags); | |
retval = *m; | |
*m = val; | |
local_irq_restore(flags); | |
return retval; | |
} | |
static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) | |
{ | |
unsigned long flags, retval; | |
local_irq_save(flags); | |
retval = *m; | |
*m = val & 0xff; | |
local_irq_restore(flags); | |
return retval; | |
} | |
static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, | |
unsigned long new) | |
{ | |
__u32 retval; | |
unsigned long flags; | |
local_irq_save(flags); | |
retval = *m; | |
if (retval == old) | |
*m = new; | |
local_irq_restore(flags); /* implies memory barrier */ | |
return retval; | |
} | |
#endif /* __ASM_SH_CMPXCHG_IRQ_H */ |