[PATCH 1/3] kprobes: introduce weak variant of kprobe_exceptions_notify

From: Naveen N. Rao
Date: Tue Feb 07 2017 - 14:55:56 EST


kprobe_exceptions_notify() is not used on some of the architectures such
as arm[64] and powerpc anymore. Introduce a weak variant for such
architectures.

Signed-off-by: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
---
kernel/kprobes.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 43460104f119..60a702a05684 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1705,6 +1705,12 @@ void unregister_kprobes(struct kprobe **kps, int num)
}
EXPORT_SYMBOL_GPL(unregister_kprobes);

+int __weak __kprobes kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ return NOTIFY_DONE;
+}
+
static struct notifier_block kprobe_exceptions_nb = {
.notifier_call = kprobe_exceptions_notify,
.priority = 0x7fffffff /* we need to be notified first */
--
2.11.0