1 #ifndef _ASM_PARISC_FUTEX_H
2 #define _ASM_PARISC_FUTEX_H
6 #include <linux/futex.h>
7 #include <linux/uaccess.h>
11 futex_atomic_op_inuser (int encoded_op
, u32 __user
*uaddr
)
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;
18 if (encoded_op
& (FUTEX_OP_OPARG_SHIFT
<< 28))
21 if (! access_ok (VERIFY_WRITE
, uaddr
, sizeof(u32
)))
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
;
52 /* Non-atomic version */
54 futex_atomic_cmpxchg_inatomic(u32
*uval
, u32 __user
*uaddr
,
55 u32 oldval
, u32 newval
)
59 /* futex.c wants to do a cmpxchg_inatomic on kernel NULL, which is
60 * our gateway page, and causes no end of trouble...
62 if (segment_eq(KERNEL_DS
, get_fs()) && !uaddr
)
65 if (!access_ok(VERIFY_WRITE
, uaddr
, sizeof(u32
)))
68 if (get_user(val
, uaddr
))
70 if (val
== oldval
&& put_user(newval
, uaddr
))
77 #endif /*_ASM_PARISC_FUTEX_H*/
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