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
11 struct __kernel_timespec;
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 unsigned long arch_data;
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 __kernel_timespec __user *rmtp;
44 struct old_timespec32 __user *compat_rmtp;
45 };
46 u64 expires;
47 } nanosleep;
48 /* For poll */
49 struct {
50 struct pollfd __user *ufds;
51 int nfds;
52 int has_timeout;
53 unsigned long tv_sec;
54 unsigned long tv_nsec;
55 } poll;
56 };
57 };
58
59 extern long do_no_restart_syscall(struct restart_block *parm);
60
61 #endif /* __LINUX_RESTART_BLOCK_H */
62
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