43 lines
825 B
C
43 lines
825 B
C
#ifndef __ASM_SH_CMPXCHG_IRQ_H
|
|
#define __ASM_SH_CMPXCHG_IRQ_H
|
|
|
|
#include <linux/irqflags.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 */
|