1 #ifndef _ASM_S390_FUTEX_H
2 #define _ASM_S390_FUTEX_H
6 #include <linux/futex.h>
8 #include <asm/uaccess.h>
10 static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
12 int op = (encoded_op >> 28) & 7;
13 int cmp = (encoded_op >> 24) & 15;
14 int oparg = (encoded_op << 8) >> 20;
15 int cmparg = (encoded_op << 20) >> 20;
18 if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
21 if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
24 ret = uaccess.futex_atomic_op(op, uaddr, oparg, &oldval);
28 case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
29 case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
30 case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
31 case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
32 case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
33 case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
34 default: ret = -ENOSYS;
40 static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr,
41 int oldval, int newval)
43 if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
46 return uaccess.futex_atomic_cmpxchg(uaddr, oldval, newval);
49 #endif /* __KERNEL__ */
50 #endif /* _ASM_S390_FUTEX_H */