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authorPaul Mackerras <paulus@samba.org>2005-09-25 08:51:50 -0400
committerPaul Mackerras <paulus@samba.org>2005-09-25 08:51:50 -0400
commite5baa396af7560382d2cf3f0871d616b61fc284c (patch)
tree6afc166894b8c8b3b2cf6add72a726be14ae2443 /include/asm-um/futex.h
parentd6a4c847e43c851cc0ddf73087a730227223f989 (diff)
parentef6bd6eb90ad72ee8ee7ba8b271f27102e9a90c1 (diff)
Merge from Linus' tree.
Diffstat (limited to 'include/asm-um/futex.h')
-rw-r--r--include/asm-um/futex.h51
1 files changed, 5 insertions, 46 deletions
diff --git a/include/asm-um/futex.h b/include/asm-um/futex.h
index 2cac5ecd9d00..142ee2d8e0fd 100644
--- a/include/asm-um/futex.h
+++ b/include/asm-um/futex.h
@@ -1,53 +1,12 @@
1#ifndef _ASM_FUTEX_H 1#ifndef __UM_FUTEX_H
2#define _ASM_FUTEX_H 2#define __UM_FUTEX_H
3
4#ifdef __KERNEL__
5 3
6#include <linux/futex.h> 4#include <linux/futex.h>
7#include <asm/errno.h> 5#include <asm/errno.h>
6#include <asm/system.h>
7#include <asm/processor.h>
8#include <asm/uaccess.h> 8#include <asm/uaccess.h>
9 9
10static inline int 10#include "asm/arch/futex.h"
11futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
12{
13 int op = (encoded_op >> 28) & 7;
14 int cmp = (encoded_op >> 24) & 15;
15 int oparg = (encoded_op << 8) >> 20;
16 int cmparg = (encoded_op << 20) >> 20;
17 int oldval = 0, ret, tem;
18 if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
19 oparg = 1 << oparg;
20
21 if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
22 return -EFAULT;
23
24 inc_preempt_count();
25
26 switch (op) {
27 case FUTEX_OP_SET:
28 case FUTEX_OP_ADD:
29 case FUTEX_OP_OR:
30 case FUTEX_OP_ANDN:
31 case FUTEX_OP_XOR:
32 default:
33 ret = -ENOSYS;
34 }
35 11
36 dec_preempt_count();
37
38 if (!ret) {
39 switch (cmp) {
40 case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
41 case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
42 case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
43 case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
44 case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
45 case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
46 default: ret = -ENOSYS;
47 }
48 }
49 return ret;
50}
51
52#endif
53#endif 12#endif