1 #ifndef _ASM_S390_FUTEX_H
2 #define _ASM_S390_FUTEX_H
4 #include <linux/uaccess.h>
5 #include <linux/futex.h>
6 #include <asm/mmu_context.h>
9 #define __futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg) \
14 "2: cs %1,%2,0(%6)\n" \
18 EX_TABLE(0b,4b) EX_TABLE(2b,4b) EX_TABLE(3b,4b) \
19 : "=d" (ret), "=&d" (oldval), "=&d" (newval), \
21 : "0" (-EFAULT), "d" (oparg), "a" (uaddr), \
24 static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
26 int op = (encoded_op >> 28) & 7;
27 int cmp = (encoded_op >> 24) & 15;
28 int oparg = (encoded_op << 8) >> 20;
29 int cmparg = (encoded_op << 20) >> 20;
30 int oldval = 0, newval, ret;
33 if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
39 __futex_atomic_op("lr %2,%5\n",
40 ret, oldval, newval, uaddr, oparg);
43 __futex_atomic_op("lr %2,%1\nar %2,%5\n",
44 ret, oldval, newval, uaddr, oparg);
47 __futex_atomic_op("lr %2,%1\nor %2,%5\n",
48 ret, oldval, newval, uaddr, oparg);
51 __futex_atomic_op("lr %2,%1\nnr %2,%5\n",
52 ret, oldval, newval, uaddr, oparg);
55 __futex_atomic_op("lr %2,%1\nxr %2,%5\n",
56 ret, oldval, newval, uaddr, oparg);
65 case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
66 case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
67 case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
68 case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
69 case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
70 case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
71 default: ret = -ENOSYS;
77 static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
78 u32 oldval, u32 newval)
88 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
89 : "=d" (ret), "+d" (oldval), "=m" (*uaddr)
90 : "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr)
96 #endif /* _ASM_S390_FUTEX_H */