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ae9a5b8565
Overloading of page fault notification with the notify_die() has performance issues(since the only interested components for page fault is kprobes and/or kdb) and hence this patch introduces the new notifier call chain exclusively for page fault notifications their by avoiding notifying unnecessary components in the do_page_fault() code path. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
#ifndef _IA64_KDEBUG_H
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#define _IA64_KDEBUG_H 1
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/*
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* include/asm-ia64/kdebug.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) Intel Corporation, 2005
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*
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* 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
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* <anil.s.keshavamurthy@intel.com> adopted from
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* include/asm-x86_64/kdebug.h
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*
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* 2005-Oct Keith Owens <kaos@sgi.com>. Expand notify_die to cover more
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* events.
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*/
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#include <linux/notifier.h>
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struct pt_regs;
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struct die_args {
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struct pt_regs *regs;
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const char *str;
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long err;
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int trapnr;
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int signr;
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};
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extern int register_die_notifier(struct notifier_block *);
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extern int unregister_die_notifier(struct notifier_block *);
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extern int register_page_fault_notifier(struct notifier_block *);
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extern int unregister_page_fault_notifier(struct notifier_block *);
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extern struct atomic_notifier_head ia64die_chain;
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enum die_val {
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DIE_BREAK = 1,
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DIE_FAULT,
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DIE_OOPS,
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DIE_PAGE_FAULT,
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DIE_MACHINE_HALT,
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DIE_MACHINE_RESTART,
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DIE_MCA_MONARCH_ENTER,
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DIE_MCA_MONARCH_PROCESS,
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DIE_MCA_MONARCH_LEAVE,
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DIE_MCA_SLAVE_ENTER,
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DIE_MCA_SLAVE_PROCESS,
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DIE_MCA_SLAVE_LEAVE,
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DIE_MCA_RENDZVOUS_ENTER,
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DIE_MCA_RENDZVOUS_PROCESS,
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DIE_MCA_RENDZVOUS_LEAVE,
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DIE_MCA_NEW_TIMEOUT,
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DIE_INIT_ENTER,
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DIE_INIT_MONARCH_ENTER,
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DIE_INIT_MONARCH_PROCESS,
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DIE_INIT_MONARCH_LEAVE,
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DIE_INIT_SLAVE_ENTER,
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DIE_INIT_SLAVE_PROCESS,
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DIE_INIT_SLAVE_LEAVE,
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DIE_KDEBUG_ENTER,
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DIE_KDEBUG_LEAVE,
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DIE_KDUMP_ENTER,
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DIE_KDUMP_LEAVE,
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};
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static inline int notify_die(enum die_val val, char *str, struct pt_regs *regs,
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long err, int trap, int sig)
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{
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struct die_args args = {
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.regs = regs,
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.str = str,
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.err = err,
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.trapnr = trap,
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.signr = sig
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};
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return atomic_notifier_call_chain(&ia64die_chain, val, &args);
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}
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#endif
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