#include <linux/module.h>#include <linux/notifier.h>#include <linux/vmalloc.h>#include <linux/kdebug.h>  static ATOMIC_NOTIFIER_HEAD(die_chain); int notify_die(enum die_val val, const char *str,	       struct pt_regs *regs, long err, int trap, int sig){	struct die_args args = {		.regs		= regs,		.str		= str,		.err		= err,		.trapnr		= trap,		.signr		= sig, 	}; 	return atomic_notifier_call_chain(&die_chain, val, &args);} int register_die_notifier(struct notifier_block *nb){	vmalloc_sync_all();	return atomic_notifier_chain_register(&die_chain, nb);}EXPORT_SYMBOL_GPL(register_die_notifier); int unregister_die_notifier(struct notifier_block *nb){	return atomic_notifier_chain_unregister(&die_chain, nb);}EXPORT_SYMBOL_GPL(unregister_die_notifier);