4 #include <uapi/linux/futex.h>
11 long do_futex(u32 __user
*uaddr
, int op
, u32 val
, union ktime
*timeout
,
12 u32 __user
*uaddr2
, u32 val2
, u32 val3
);
15 handle_futex_death(u32 __user
*uaddr
, struct task_struct
*curr
, int pi
);
18 * Futexes are matched on equal values of this key.
19 * The key type depends on whether it's a shared or private mapping.
20 * Don't rearrange members without looking at hash_futex().
22 * offset is aligned to a multiple of sizeof(u32) (== 4) by definition.
23 * We use the two low order bits of offset to tell what is the kind of key :
24 * 00 : Private process futex (PTHREAD_PROCESS_PRIVATE)
25 * (no reference on an inode or mm)
26 * 01 : Shared futex (PTHREAD_PROCESS_SHARED)
27 * mapped on a file (reference on the underlying inode)
28 * 10 : Shared futex (PTHREAD_PROCESS_SHARED)
29 * (but private mapping on an mm, and reference taken on it)
32 #define FUT_OFF_INODE 1 /* We set bit 0 if key has a reference on inode */
33 #define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */
42 unsigned long address
;
53 #define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = NULL } }
56 extern void exit_robust_list(struct task_struct
*curr
);
57 extern void exit_pi_state_list(struct task_struct
*curr
);
58 #ifdef CONFIG_HAVE_FUTEX_CMPXCHG
59 #define futex_cmpxchg_enabled 1
61 extern int futex_cmpxchg_enabled
;
64 static inline void exit_robust_list(struct task_struct
*curr
)
67 static inline void exit_pi_state_list(struct task_struct
*curr
)
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