From: Ananth N Mavinakayanahalli <amavin@redhat.com>
Date: Wed, 8 Jun 2005 05:33:43 +0000 (+1000)
Subject: [PATCH] ppc64 kprobes: don't eat dabr/iabr exceptions
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=358c6ac0dd4ffa5e44d59d4008a2627aa2f02b6f;p=deliverable%2Flinux.git

[PATCH] ppc64 kprobes: don't eat dabr/iabr exceptions

Kprobes was eating the hardware instruction and data address
breakpoint exceptions.  This patch fixes it; kprobes doesn't use those
exceptions at all and should ignore them.

Signed-off-by: Ananth N Mavinakayanahalli <amavin@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/ppc64/kernel/kprobes.c b/arch/ppc64/kernel/kprobes.c
index 103daaf73573..5a9f47b18c45 100644
--- a/arch/ppc64/kernel/kprobes.c
+++ b/arch/ppc64/kernel/kprobes.c
@@ -233,8 +233,6 @@ int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val,
 	 */
 	preempt_disable();
 	switch (val) {
-	case DIE_IABR_MATCH:
-	case DIE_DABR_MATCH:
 	case DIE_BPT:
 		if (kprobe_handler(args->regs))
 			ret = NOTIFY_STOP;