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