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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_FUTEX_IRQ_H
   3 #define __ASM_SH_FUTEX_IRQ_H
   4
   5 static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
   6                                                    u32 __user *uaddr,
   7                                                    u32 oldval, u32 newval)
   8 {
   9         unsigned long flags;
  10         int ret;
  11         u32 prev = 0;
  12
  13         local_irq_save(flags);
  14
  15         ret = get_user(prev, uaddr);
  16         if (!ret && oldval == prev)
  17                 ret = put_user(newval, uaddr);
  18
  19         local_irq_restore(flags);
  20
  21         *uval = prev;
  22         return ret;
  23 }
  24
  25 #endif /* __ASM_SH_FUTEX_IRQ_H */