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authorAndi Kleen <ak@suse.de>2006-09-26 10:52:35 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:35 +0200
commit474c256841074b913e76e392082373e12103a75d (patch)
tree64f6e504e68b8345b1199898c9b03a80e7becee5 /arch/i386/mm
parent273819a2d982faace30e587b86a0683882251fe7 (diff)
[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>
Diffstat (limited to 'arch/i386/mm')
-rw-r--r--arch/i386/mm/fault.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index f7279468323..0ce86168a0b 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 @@ static inline int notify_page_fault(enum die_val val, const char *str,
};
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