| #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 */ |
