[PATCH for review] [124/145] i386: make fault notifier unconditional and export it

Andi Kleen
2006-08-10T19:48:11Z

r

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 | 14 ++++----------
1 files changed, 4 insertions(+), 10 deletions(-)

Index: linux/arch/i386/mm/fault.c
===================================================================
--- linux.orig/arch/i386/mm/fault.c
+++ linux/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
};
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