include/linux/restart_block.h

   1 /*
   2  * Common syscall restarting data
   3  */
   4 #ifndef __LINUX_RESTART_BLOCK_H
   5 #define __LINUX_RESTART_BLOCK_H
   6
   7 #include <linux/compiler.h>
   8 #include <linux/types.h>
   9
  10 struct timespec;
  11 struct compat_timespec;
  12 struct pollfd;
  13
  14 enum timespec_type {
  15         TT_NONE         = 0,
  16         TT_NATIVE       = 1,
  17 #ifdef CONFIG_COMPAT
  18         TT_COMPAT       = 2,
  19 #endif
  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 timespec __user *rmtp;
  43 #ifdef CONFIG_COMPAT
  44                                 struct compat_timespec __user *compat_rmtp;
  45 #endif
  46                         };
  47                         u64 expires;
  48                 } nanosleep;
  49                 /* For poll */
  50                 struct {
  51                         struct pollfd __user *ufds;
  52                         int nfds;
  53                         int has_timeout;
  54                         unsigned long tv_sec;
  55                         unsigned long tv_nsec;
  56                 } poll;
  57         };
  58 };
  59
  60 extern long do_no_restart_syscall(struct restart_block *parm);
  61
  62 #endif /* __LINUX_RESTART_BLOCK_H */