fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sh / futex.h
blob74ed3681d33c3298a0b35f5d514fff8251320994
1 #ifndef __ASM_SH_FUTEX_H
2 #define __ASM_SH_FUTEX_H
4 #ifdef __KERNEL__
6 #include <linux/futex.h>
7 #include <asm/errno.h>
8 #include <asm/uaccess.h>
10 /* XXX: UP variants, fix for SH-4A and SMP.. */
11 #include <asm/futex-irq.h>
13 static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
15 int op = (encoded_op >> 28) & 7;
16 int cmp = (encoded_op >> 24) & 15;
17 int oparg = (encoded_op << 8) >> 20;
18 int cmparg = (encoded_op << 20) >> 20;
19 int oldval = 0, ret;
21 if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
22 oparg = 1 << oparg;
24 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
25 return -EFAULT;
27 pagefault_disable();
29 switch (op) {
30 case FUTEX_OP_SET:
31 ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval);
32 break;
33 case FUTEX_OP_ADD:
34 ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval);
35 break;
36 case FUTEX_OP_OR:
37 ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval);
38 break;
39 case FUTEX_OP_ANDN:
40 ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval);
41 break;
42 case FUTEX_OP_XOR:
43 ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval);
44 break;
45 default:
46 ret = -ENOSYS;
47 break;
50 pagefault_enable();
52 if (!ret) {
53 switch (cmp) {
54 case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
55 case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
56 case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
57 case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
58 case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
59 case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
60 default: ret = -ENOSYS;
64 return ret;
67 static inline int
68 futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
70 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
71 return -EFAULT;
73 return atomic_futex_op_cmpxchg_inatomic(uaddr, oldval, newval);
76 #endif /* __KERNEL__ */
77 #endif /* __ASM_SH_FUTEX_H */