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authorIngo Molnar <mingo@elte.hu>2009-02-20 22:42:57 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-21 00:09:42 +0100
commitb18018126f422f5b706fd750373425e10e84b486 (patch)
treee3e4954ca44999b25475307afb0653eed39ff63f /include/linux
parentb814d41f0987c7648d7ed07471258101c95c026b (diff)
x86, mm, kprobes: fault.c, simplify notify_page_fault()
Impact: cleanup Remove an #ifdef from notify_page_fault(). The function still compiles to nothing in the !CONFIG_KPROBES case. Introduce kprobes_built_in() and kprobe_fault_handler() helpers to allow this - they returns 0 if !CONFIG_KPROBES. No code changed: text data bss dec hex filename 4618 32 24 4674 1242 fault.o.before 4618 32 24 4674 1242 fault.o.after Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/kprobes.h22
1 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 32851eef48f..2ec6cc14a11 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -182,6 +182,14 @@ struct kprobe_blackpoint {
DECLARE_PER_CPU(struct kprobe *, current_kprobe);
DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
+/*
+ * For #ifdef avoidance:
+ */
+static inline int kprobes_built_in(void)
+{
+ return 1;
+}
+
#ifdef CONFIG_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs);
@@ -271,8 +279,16 @@ void unregister_kretprobes(struct kretprobe **rps, int num);
void kprobe_flush_task(struct task_struct *tk);
void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
-#else /* CONFIG_KPROBES */
+#else /* !CONFIG_KPROBES: */
+static inline int kprobes_built_in(void)
+{
+ return 0;
+}
+static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+{
+ return 0;
+}
static inline struct kprobe *get_kprobe(void *addr)
{
return NULL;
@@ -329,5 +345,5 @@ static inline void unregister_kretprobes(struct kretprobe **rps, int num)
static inline void kprobe_flush_task(struct task_struct *tk)
{
}
-#endif /* CONFIG_KPROBES */
-#endif /* _LINUX_KPROBES_H */
+#endif /* CONFIG_KPROBES */
+#endif /* _LINUX_KPROBES_H */