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OpenCloudOS-Kernel
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[PATCH] 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>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:35 +02:00 committed by Andi Kleen
parent 5e4edbb711
commit 273819a2d9
1 changed files with 3 additions and 9 deletions
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12
arch/x86_64/mm/fault.c
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@ -40,8 +40,7 @@
#define PF_RSVD (1<<3)
#define PF_INSTR (1<<4)
#ifdef CONFIG_KPROBES
ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
/* Hook to register for page fault notifications */
int register_page_fault_notifier(struct notifier_block *nb)
@ -49,11 +48,13 @@ 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)
@ -67,13 +68,6 @@ 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
void bust_spinlocks(int yes)
{