[PATCH] Kprobes ia64 cleanup

A cleanup of the ia64 kprobes implementation such that all of the bundle
manipulation logic is concentrated in arch_prepare_kprobe().

With the current design for kprobes, the arch specific code only has a
chance to return failure inside the arch_prepare_kprobe() function.

This patch moves all of the work that was happening in arch_copy_kprobe()
and most of the work that was happening in arch_arm_kprobe() into
arch_prepare_kprobe().  By doing this we can add further robustness checks
in arch_arm_kprobe() and refuse to insert kprobes that will cause problems.

Signed-off-by: Rusty Lynch <Rusty.lynch@intel.com>
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/asm-ia64/kprobes.h b/include/asm-ia64/kprobes.h
index d30af77a0b11..cec4d9958307 100644
--- a/include/asm-ia64/kprobes.h
+++ b/include/asm-ia64/kprobes.h
@@ -30,6 +30,8 @@
 
 #define BREAK_INST      (long)(__IA64_BREAK_KPROBE << 6)
 
+struct kprobe;
+
 typedef struct _bundle {
         struct {
                 unsigned long long template : 5;
@@ -79,6 +81,11 @@ static inline void jprobe_return(void)
 {
 }
 
+/* ia64 does not need this */
+static inline void arch_copy_kprobe(struct kprobe *p)
+{
+}
+
 #ifdef CONFIG_KPROBES
 extern int kprobe_exceptions_notify(struct notifier_block *self,
                                     unsigned long val, void *data);