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

   1 #ifndef __ASM_SH_FUTEX_IRQ_H
   2 #define __ASM_SH_FUTEX_IRQ_H
   3
   4
   5 static inline int atomic_futex_op_xchg_set(int oparg, u32 __user *uaddr,
   6                                            int *oldval)
   7 {
   8         unsigned long flags;
   9         int ret;
  10
  11         local_irq_save(flags);
  12
  13         ret = get_user(*oldval, uaddr);
  14         if (!ret)
  15                 ret = put_user(oparg, uaddr);
  16
  17         local_irq_restore(flags);
  18
  19         return ret;
  20 }
  21
  22 static inline int atomic_futex_op_xchg_add(int oparg, u32 __user *uaddr,
  23                                            int *oldval)
  24 {
  25         unsigned long flags;
  26         int ret;
  27
  28         local_irq_save(flags);
  29
  30         ret = get_user(*oldval, uaddr);
  31         if (!ret)
  32                 ret = put_user(*oldval + oparg, uaddr);
  33
  34         local_irq_restore(flags);
  35
  36         return ret;
  37 }
  38
  39 static inline int atomic_futex_op_xchg_or(int oparg, u32 __user *uaddr,
  40                                           int *oldval)
  41 {
  42         unsigned long flags;
  43         int ret;
  44
  45         local_irq_save(flags);
  46
  47         ret = get_user(*oldval, uaddr);
  48         if (!ret)
  49                 ret = put_user(*oldval | oparg, uaddr);
  50
  51         local_irq_restore(flags);
  52
  53         return ret;
  54 }
  55
  56 static inline int atomic_futex_op_xchg_and(int oparg, u32 __user *uaddr,
  57                                            int *oldval)
  58 {
  59         unsigned long flags;
  60         int ret;
  61
  62         local_irq_save(flags);
  63
  64         ret = get_user(*oldval, uaddr);
  65         if (!ret)
  66                 ret = put_user(*oldval & oparg, uaddr);
  67
  68         local_irq_restore(flags);
  69
  70         return ret;
  71 }
  72
  73 static inline int atomic_futex_op_xchg_xor(int oparg, u32 __user *uaddr,
  74                                            int *oldval)
  75 {
  76         unsigned long flags;
  77         int ret;
  78
  79         local_irq_save(flags);
  80
  81         ret = get_user(*oldval, uaddr);
  82         if (!ret)
  83                 ret = put_user(*oldval ^ oparg, uaddr);
  84
  85         local_irq_restore(flags);
  86
  87         return ret;
  88 }
  89
  90 static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
  91                                                    u32 __user *uaddr,
  92                                                    u32 oldval, u32 newval)
  93 {
  94         unsigned long flags;
  95         int ret;
  96         u32 prev = 0;
  97
  98         local_irq_save(flags);
  99
 100         ret = get_user(prev, uaddr);
 101         if (!ret && oldval == prev)
 102                 ret = put_user(newval, uaddr);
 103
 104         local_irq_restore(flags);
 105
 106         *uval = prev;
 107         return ret;
 108 }
 109
 110 #endif /* __ASM_SH_FUTEX_IRQ_H */