commit 474c256841074b913e76e392082373e12103a75d
author Andi Kleen <ak@suse.de> Tue Sep 26 10:52:35 2006 +0200
committer Andi Kleen <andi@basil.nowhere.org> Tue Sep 26 10:52:35 2006 +0200
tree 64f6e504e68b8345b1199898c9b03a80e7becee5
parent 273819a2d982faace30e587b86a0683882251fe7

[PATCH] i386: make fault notifier unconditional and export it

It's needed for external debuggers and overhead is very small.

Also make the actual notifier chain they use static

Cc: jbeulich@novell.com

Signed-off-by: Andi Kleen <ak@suse.de>

arch/i386/mm/fault.c

diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index f727946..0ce86168 100644
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -30,18 +30,20 @@
 
 extern void die(const char *,struct pt_regs *,long);
 
-#ifdef CONFIG_KPROBES
-ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+
 int register_page_fault_notifier(struct notifier_block *nb)
 {
 	vmalloc_sync_all();
 	return atomic_notifier_chain_register(&notify_page_fault_chain, nb);
 }
+EXPORT_SYMBOL_GPL(register_page_fault_notifier);
 
 int unregister_page_fault_notifier(struct notifier_block *nb)
 {
 	return atomic_notifier_chain_unregister(&notify_page_fault_chain, nb);
 }
+EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
 
 static inline int notify_page_fault(enum die_val val, const char *str,
 			struct pt_regs *regs, long err, int trap, int sig)
@@ -55,14 +57,6 @@
 	};
 	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
 }
-#else
-static inline int notify_page_fault(enum die_val val, const char *str,
-			struct pt_regs *regs, long err, int trap, int sig)
-{
-	return NOTIFY_DONE;
-}
-#endif
-
 
 /*
  * Unlock any spinlocks which will prevent us from getting the