include/linux/sysrq.h

   1 /* -*- linux-c -*-
   2  *
   3  *      $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $
   4  *
   5  *      Linux Magic System Request Key Hacks
   6  *
   7  *      (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   8  */
   9
  10 #include <linux/config.h>
  11
  12 struct pt_regs;
  13 struct kbd_struct;
  14 struct tty_struct;
  15
  16 /* Generic SysRq interface -- you may call it from any device driver, supplying
  17  * ASCII code of the key, pointer to registers and kbd/tty structs (if they
  18  * are available -- else NULL's).
  19  */
  20
  21 void handle_sysrq(int, struct pt_regs *, struct kbd_struct *, struct tty_struct *);
  22
  23 /* Deferred actions */
  24
  25 extern int emergency_sync_scheduled;
  26
  27 #define EMERG_SYNC 1
  28 #define EMERG_REMOUNT 2
  29
  30 void do_emergency_sync(void);
  31
  32 #ifdef CONFIG_MAGIC_SYSRQ
  33 #define CHECK_EMERGENCY_SYNC                    \
  34         if (emergency_sync_scheduled)           \
  35                 do_emergency_sync();
  36 #else
  37 #define CHECK_EMERGENCY_SYNC
  38 #endif