1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Common syscall restarting data
4 */
5 #ifndef __LINUX_RESTART_BLOCK_H
6 #define __LINUX_RESTART_BLOCK_H
7
8 #include <linux/compiler.h>
9 #include <linux/types.h>
10 #include <linux/time64.h>
11
12 struct timespec;
13 struct old_timespec32;
14 struct pollfd;
15
16 enum timespec_type {
17 TT_NONE = 0,
18 TT_NATIVE = 1,
19 TT_COMPAT = 2,
20 };
21
22 /*
23 * System call restart block.
24 */
25 struct restart_block {
26 long (*fn)(struct restart_block *);
27 union {
28 /* For futex_wait and futex_wait_requeue_pi */
29 struct {
30 u32 __user *uaddr;
31 u32 val;
32 u32 flags;
33 u32 bitset;
34 u64 time;
35 u32 __user *uaddr2;
36 } futex;
37 /* For nanosleep */
38 struct {
39 clockid_t clockid;
40 enum timespec_type type;
41 union {
42 struct __kernel_timespec __user *rmtp;
43 struct old_timespec32 __user *compat_rmtp;
44 };
45 u64 expires;
46 } nanosleep;
47 /* For poll */
48 struct {
49 struct pollfd __user *ufds;
50 int nfds;
51 int has_timeout;
52 unsigned long tv_sec;
53 unsigned long tv_nsec;
54 } poll;
55 };
56 };
57
58 extern long do_no_restart_syscall(struct restart_block *parm);
59
60 #endif /* __LINUX_RESTART_BLOCK_H */