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authorChristoph Hellwig <hch@infradead.org>2007-04-30 06:56:46 -0400
committerPaul Mackerras <paulus@samba.org>2007-05-02 06:57:39 -0400
commit9f90b997de4efd5404a8c52f89c400f0f4e2d216 (patch)
tree7dd6adc27b196e672fedd464a42700e336cd210a /include
parenteb609e52d188775da738a1ffd1e982e6212c77d7 (diff)
[POWERPC] Minor fault path optimization
Call the kprobes pagefault handler directly instead of going through the complex notifier chain. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-powerpc/kdebug.h17
-rw-r--r--include/asm-powerpc/kprobes.h1
2 files changed, 15 insertions, 3 deletions
diff --git a/include/asm-powerpc/kdebug.h b/include/asm-powerpc/kdebug.h
index 532bfee934f4..df996b933def 100644
--- a/include/asm-powerpc/kdebug.h
+++ b/include/asm-powerpc/kdebug.h
@@ -18,8 +18,20 @@ struct die_args {
18 18
19extern int register_die_notifier(struct notifier_block *); 19extern int register_die_notifier(struct notifier_block *);
20extern int unregister_die_notifier(struct notifier_block *); 20extern int unregister_die_notifier(struct notifier_block *);
21extern int register_page_fault_notifier(struct notifier_block *); 21
22extern int unregister_page_fault_notifier(struct notifier_block *); 22/*
23 * These are only here because kprobes.c wants them to implement a
24 * blatant layering violation. Will hopefully go away soon once all
25 * architectures are updated.
26 */
27static inline int register_page_fault_notifier(struct notifier_block *nb)
28{
29 return 0;
30}
31static inline int unregister_page_fault_notifier(struct notifier_block *nb)
32{
33 return 0;
34}
23extern struct atomic_notifier_head powerpc_die_chain; 35extern struct atomic_notifier_head powerpc_die_chain;
24 36
25/* Grossly misnamed. */ 37/* Grossly misnamed. */
@@ -29,7 +41,6 @@ enum die_val {
29 DIE_DABR_MATCH, 41 DIE_DABR_MATCH,
30 DIE_BPT, 42 DIE_BPT,
31 DIE_SSTEP, 43 DIE_SSTEP,
32 DIE_PAGE_FAULT,
33}; 44};
34 45
35static inline int notify_die(enum die_val val,char *str,struct pt_regs *regs,long err,int trap, int sig) 46static inline int notify_die(enum die_val val,char *str,struct pt_regs *regs,long err,int trap, int sig)
diff --git a/include/asm-powerpc/kprobes.h b/include/asm-powerpc/kprobes.h
index fc713e595982..b0e40ff32ee0 100644
--- a/include/asm-powerpc/kprobes.h
+++ b/include/asm-powerpc/kprobes.h
@@ -116,5 +116,6 @@ struct kprobe_ctlblk {
116 116
117extern int kprobe_exceptions_notify(struct notifier_block *self, 117extern int kprobe_exceptions_notify(struct notifier_block *self,
118 unsigned long val, void *data); 118 unsigned long val, void *data);
119extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
119#endif /* __KERNEL__ */ 120#endif /* __KERNEL__ */
120#endif /* _ASM_POWERPC_KPROBES_H */ 121#endif /* _ASM_POWERPC_KPROBES_H */