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 compat_timespec;
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 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 
58 extern long do_no_restart_syscall(struct restart_block *parm);
59 
60 #endif /* __LINUX_RESTART_BLOCK_H */
61