1#ifndef _ASM_GENERIC_FUTEX_H
 2#define _ASM_GENERIC_FUTEX_H
 3
 4#include <linux/futex.h>
 5#include <linux/uaccess.h>
 6#include <asm/errno.h>
 7
 8static inline int
 9futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
10{
11	int op = (encoded_op >> 28) & 7;
12	int cmp = (encoded_op >> 24) & 15;
13	int oparg = (encoded_op << 8) >> 20;
14	int cmparg = (encoded_op << 20) >> 20;
15	int oldval = 0, ret;
16	if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
17		oparg = 1 << oparg;
18
19	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
20		return -EFAULT;
21
22	pagefault_disable();
23
24	switch (op) {
25	case FUTEX_OP_SET:
26	case FUTEX_OP_ADD:
27	case FUTEX_OP_OR:
28	case FUTEX_OP_ANDN:
29	case FUTEX_OP_XOR:
30	default:
31		ret = -ENOSYS;
32	}
33
34	pagefault_enable();
35
36	if (!ret) {
37		switch (cmp) {
38		case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
39		case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
40		case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
41		case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
42		case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
43		case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
44		default: ret = -ENOSYS;
45		}
46	}
47	return ret;
48}
49
50static inline int
51futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
52			      u32 oldval, u32 newval)
53{
54	return -ENOSYS;
55}
56
57#endif

 1#ifndef _ASM_GENERIC_FUTEX_H
 2#define _ASM_GENERIC_FUTEX_H
 3
 4#include <linux/futex.h>
 5#include <linux/uaccess.h>
 6#include <asm/errno.h>
 7
 8static inline int
 9futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
10{
11	int op = (encoded_op >> 28) & 7;
12	int cmp = (encoded_op >> 24) & 15;
13	int oparg = (encoded_op << 8) >> 20;
14	int cmparg = (encoded_op << 20) >> 20;
15	int oldval = 0, ret;
16	if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
17		oparg = 1 << oparg;
18
19	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
20		return -EFAULT;
21
22	pagefault_disable();
23
24	switch (op) {
25	case FUTEX_OP_SET:
26	case FUTEX_OP_ADD:
27	case FUTEX_OP_OR:
28	case FUTEX_OP_ANDN:
29	case FUTEX_OP_XOR:
30	default:
31		ret = -ENOSYS;
32	}
33
34	pagefault_enable();
35
36	if (!ret) {
37		switch (cmp) {
38		case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
39		case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
40		case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
41		case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
42		case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
43		case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
44		default: ret = -ENOSYS;
45		}
46	}
47	return ret;
48}
49
50static inline int
51futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
52			      u32 oldval, u32 newval)
53{
54	return -ENOSYS;
55}
56
57#endif