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[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>
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@ -30,18 +30,20 @@
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extern void die(const char *,struct pt_regs *,long);
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#ifdef CONFIG_KPROBES
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ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
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static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
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int register_page_fault_notifier(struct notifier_block *nb)
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{
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vmalloc_sync_all();
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return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
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}
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EXPORT_SYMBOL_GPL(register_page_fault_notifier);
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int unregister_page_fault_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
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}
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EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
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static inline int notify_page_fault(enum die_val val, const char *str,
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struct pt_regs *regs, long err, int trap, int sig)
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@ -55,14 +57,6 @@ static inline int notify_page_fault(enum die_val val, const char *str,
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};
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return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
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}
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#else
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static inline int notify_page_fault(enum die_val val, const char *str,
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struct pt_regs *regs, long err, int trap, int sig)
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{
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return NOTIFY_DONE;
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}
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#endif
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/*
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* Unlock any spinlocks which will prevent us from getting the
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