[S390] add arch_trampoline_kprobe.

[Martin Schwidefsky <schwidefsky@de.ibm.com>]

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

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

Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Srinivasa DS <srinivasa@in.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

 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
--- linux-2.6/arch/s390/kernel/kprobes.c	2007-04-19 17:12:40.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/kprobes.c	2007-04-19 17:12:09.000000000 +0200
@@ -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);
-
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