arch/sh/include/asm/futex-irq.h

   1 #ifndef __ASM_SH_FUTEX_IRQ_H
   2 #define __ASM_SH_FUTEX_IRQ_H
   3
   4 static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
   5                                                    u32 __user *uaddr,
   6                                                    u32 oldval, u32 newval)
   7 {
   8         unsigned long flags;
   9         int ret;
  10         u32 prev = 0;
  11
  12         local_irq_save(flags);
  13
  14         ret = get_user(prev, uaddr);
  15         if (!ret && oldval == prev)
  16                 ret = put_user(newval, uaddr);
  17
  18         local_irq_restore(flags);
  19
  20         *uval = prev;
  21         return ret;
  22 }
  23
  24 #endif /* __ASM_SH_FUTEX_IRQ_H */