From d98f8f05188b45168db43df8ddc9feeb0b1cd512 Mon Sep 17 00:00:00 2001
From: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Date: Mon, 26 Jun 2006 00:25:27 -0700
Subject: [PATCH] Notify page fault call chain for sparc64
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>
---
include/asm-sparc64/kdebug.h | 2 ++
1 file changed, 2 insertions(+)
(limited to 'include')
diff --git a/include/asm-sparc64/kdebug.h b/include/asm-sparc64/kdebug.h
index 4040d127ac..11251bdd00 100644
--- a/include/asm-sparc64/kdebug.h
+++ b/include/asm-sparc64/kdebug.h
@@ -17,6 +17,8 @@ struct die_args {
extern int register_die_notifier(struct notifier_block *);
extern int unregister_die_notifier(struct notifier_block *);
+extern int register_page_fault_notifier(struct notifier_block *);
+extern int unregister_page_fault_notifier(struct notifier_block *);
extern struct atomic_notifier_head sparc64die_chain;
extern void bad_trap(struct pt_regs *, long);
--
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