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
12struct timespec;
13struct compat_timespec;
14struct pollfd;
15
16enum timespec_type {
17 TT_NONE = 0,
18 TT_NATIVE = 1,
19 TT_COMPAT = 2,
20};
21
22/*
23 * System call restart block.
24 */
25struct 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 compat_timespec __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
58extern long do_no_restart_syscall(struct restart_block *parm);
59
60#endif /* __LINUX_RESTART_BLOCK_H */
61