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

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