linux-kernel - [PATCH 1/3] kprobes: introduce weak variant of kprobe_exceptions

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Date:   Wed,  8 Feb 2017 01:24:14 +0530
From:   "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:     mhiramat@...nel.org, ananth@...ux.vnet.ibm.com
Cc:     mingo@...nel.org, mpe@...erman.id.au,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 1/3] kprobes: introduce weak variant of kprobe_exceptions_notify

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@...ux.vnet.ibm.com>
---
 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