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authorAnil S Keshavamurthy <anil.s.keshavamurthy@intel.com>2006-06-26 00:25:27 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:22 -0700
commit4f9e87c0454059e80f3811f95ad9f40ed28c69a2 (patch)
treecc8290b8fc757b34e01a4e9c25bbe00496400084 /include/asm-powerpc
parentae9a5b85655d7133ab8e7c99b742ef20c8dbb7d2 (diff)
downloadop-kernel-dev-4f9e87c0454059e80f3811f95ad9f40ed28c69a2.zip
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[PATCH] Notify page fault call chain for powerpc
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>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/kdebug.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-powerpc/kdebug.h b/include/asm-powerpc/kdebug.h
index c01786a..532bfee 100644
--- a/include/asm-powerpc/kdebug.h
+++ b/include/asm-powerpc/kdebug.h
@@ -18,6 +18,8 @@ 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 powerpc_die_chain;
/* Grossly misnamed. */
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