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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
11struct timespec;
12struct compat_timespec;
13struct pollfd;
14
15enum timespec_type {
16 TT_NONE = 0,
17 TT_NATIVE = 1,
18#ifdef CONFIG_COMPAT
19 TT_COMPAT = 2,
20#endif
21};
22
23/*
24 * System call restart block.
25 */
26struct restart_block {
27 long (*fn)(struct restart_block *);
28 union {
29 /* For futex_wait and futex_wait_requeue_pi */
30 struct {
31 u32 __user *uaddr;
32 u32 val;
33 u32 flags;
34 u32 bitset;
35 u64 time;
36 u32 __user *uaddr2;
37 } futex;
38 /* For nanosleep */
39 struct {
40 clockid_t clockid;
41 enum timespec_type type;
42 union {
43 struct timespec __user *rmtp;
44#ifdef CONFIG_COMPAT
45 struct compat_timespec __user *compat_rmtp;
46#endif
47 };
48 u64 expires;
49 } nanosleep;
50 /* For poll */
51 struct {
52 struct pollfd __user *ufds;
53 int nfds;
54 int has_timeout;
55 unsigned long tv_sec;
56 unsigned long tv_nsec;
57 } poll;
58 };
59};
60
61extern long do_no_restart_syscall(struct restart_block *parm);
62
63#endif /* __LINUX_RESTART_BLOCK_H */