kernel/die_notifier.c

   1
   2 #include <linux/module.h>
   3 #include <linux/notifier.h>
   4 #include <linux/vmalloc.h>
   5 #include <linux/kdebug.h>
   6
   7
   8 static ATOMIC_NOTIFIER_HEAD(die_chain);
   9
  10 int notify_die(enum die_val val, const char *str,
  11                struct pt_regs *regs, long err, int trap, int sig)
  12 {
  13         struct die_args args = {
  14                 .regs           = regs,
  15                 .str            = str,
  16                 .err            = err,
  17                 .trapnr         = trap,
  18                 .signr          = sig,
  19
  20         };
  21
  22         return atomic_notifier_call_chain(&die_chain, val, &args);
  23 }
  24
  25 int register_die_notifier(struct notifier_block *nb)
  26 {
  27         vmalloc_sync_all();
  28         return atomic_notifier_chain_register(&die_chain, nb);
  29 }
  30 EXPORT_SYMBOL_GPL(register_die_notifier);
  31
  32 int unregister_die_notifier(struct notifier_block *nb)
  33 {
  34         return atomic_notifier_chain_unregister(&die_chain, nb);
  35 }
  36 EXPORT_SYMBOL_GPL(unregister_die_notifier);
  37
  38