add arch_trampoline_kprobe.

From: Martin Schwidefsky <[email protected]>

Add the missing arch_trampoline_kprobe function for s390 required by kprobes-the-on-off-knob-thru-debugfs-updated.patch.

Cc Ananth N Mavinakayanahalli <[email protected]>

Cc Srinivasa DS <[email protected]>

Cc Andrew Morton <[email protected]>

Signed-off-by Martin Schwidefsky <[email protected]>

---

 arch/s390/kernel/kprobes.c |    7 +++++++
 1 files changed, 7 insertions(+)

diff -urpN linux-2.6/arch/s390/kernel/kprobes.c linux-2.6-patched/arch/s390/kernel/kprobes.c

arch/s390/kernel/kprobes.c +7 -0

@@ -658,6 +658,13 @@ static struct kprobe trampoline_p = {
 	.pre_handler = trampoline_probe_handler
 };
 
+int __kprobes arch_trampoline_kprobe(struct kprobe *p)
+{
+	if (p->addr == (kprobe_opcode_t *)&kretprobe_trampoline)
+		return 1;
+	return 0;
+}
+
 int __init arch_init_kprobes(void)
 {
 	return register_kprobe(&trampoline_p);

Cornelia provided this patch sometime earlier
(http://marc.info/?l=linux-kernel&m=117620748921086&w=2). Andrew has picked it up into -mm.