diff options
Diffstat (limited to 'include/asm-s390/futex.h')
-rw-r--r-- | include/asm-s390/futex.h | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h deleted file mode 100644 index 5c5d02de49e9..000000000000 --- a/include/asm-s390/futex.h +++ /dev/null | |||
@@ -1,52 +0,0 @@ | |||
1 | #ifndef _ASM_S390_FUTEX_H | ||
2 | #define _ASM_S390_FUTEX_H | ||
3 | |||
4 | #ifdef __KERNEL__ | ||
5 | |||
6 | #include <linux/futex.h> | ||
7 | #include <linux/uaccess.h> | ||
8 | #include <asm/errno.h> | ||
9 | |||
10 | static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr) | ||
11 | { | ||
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; | ||
16 | int oldval, ret; | ||
17 | |||
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 | pagefault_disable(); | ||
25 | ret = uaccess.futex_atomic_op(op, uaddr, oparg, &oldval); | ||
26 | pagefault_enable(); | ||
27 | |||
28 | if (!ret) { | ||
29 | switch (cmp) { | ||
30 | case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; | ||
31 | case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; | ||
32 | case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; | ||
33 | case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; | ||
34 | case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; | ||
35 | case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; | ||
36 | default: ret = -ENOSYS; | ||
37 | } | ||
38 | } | ||
39 | return ret; | ||
40 | } | ||
41 | |||
42 | static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, | ||
43 | int oldval, int newval) | ||
44 | { | ||
45 | if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) | ||
46 | return -EFAULT; | ||
47 | |||
48 | return uaccess.futex_atomic_cmpxchg(uaddr, oldval, newval); | ||
49 | } | ||
50 | |||
51 | #endif /* __KERNEL__ */ | ||
52 | #endif /* _ASM_S390_FUTEX_H */ | ||