diff options
Diffstat (limited to 'include/asm-sh/futex.h')
-rw-r--r-- | include/asm-sh/futex.h | 79 |
1 files changed, 75 insertions, 4 deletions
diff --git a/include/asm-sh/futex.h b/include/asm-sh/futex.h index 6a332a9f099c..74ed3681d33c 100644 --- a/include/asm-sh/futex.h +++ b/include/asm-sh/futex.h | |||
@@ -1,6 +1,77 @@ | |||
1 | #ifndef _ASM_FUTEX_H | 1 | #ifndef __ASM_SH_FUTEX_H |
2 | #define _ASM_FUTEX_H | 2 | #define __ASM_SH_FUTEX_H |
3 | 3 | ||
4 | #include <asm-generic/futex.h> | 4 | #ifdef __KERNEL__ |
5 | 5 | ||
6 | #endif | 6 | #include <linux/futex.h> |
7 | #include <asm/errno.h> | ||
8 | #include <asm/uaccess.h> | ||
9 | |||
10 | /* XXX: UP variants, fix for SH-4A and SMP.. */ | ||
11 | #include <asm/futex-irq.h> | ||
12 | |||
13 | static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr) | ||
14 | { | ||
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; | ||
20 | |||
21 | if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) | ||
22 | oparg = 1 << oparg; | ||
23 | |||
24 | if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) | ||
25 | return -EFAULT; | ||
26 | |||
27 | pagefault_disable(); | ||
28 | |||
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; | ||
48 | } | ||
49 | |||
50 | pagefault_enable(); | ||
51 | |||
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; | ||
61 | } | ||
62 | } | ||
63 | |||
64 | return ret; | ||
65 | } | ||
66 | |||
67 | static inline int | ||
68 | futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) | ||
69 | { | ||
70 | if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) | ||
71 | return -EFAULT; | ||
72 | |||
73 | return atomic_futex_op_cmpxchg_inatomic(uaddr, oldval, newval); | ||
74 | } | ||
75 | |||
76 | #endif /* __KERNEL__ */ | ||
77 | #endif /* __ASM_SH_FUTEX_H */ | ||