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 timespec; 12 struct compat_timespec; 13 struct pollfd; 14 15 enum 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 */ 26 struct 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 61 extern long do_no_restart_syscall(struct restart_block *parm); 62 63 #endif /* __LINUX_RESTART_BLOCK_H */ 64