From: Guo Ren <ren_guo@c-sky.com>
Date: Mon, 31 Dec 2018 12:52:41 +0000 (+0800)
Subject: clocksource/drivers/c-sky: fixup ftrace call-graph panic
X-Git-Tag: v5.0-rc1~37^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0c87bb0e872cbbad59a965fc67668364066aa85e;p=thirdparty%2Fkernel%2Flinux.git

clocksource/drivers/c-sky: fixup ftrace call-graph panic

We must add notrace on sched_clock_read, because it's called
by ftrace_graph_caller.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---

diff --git a/drivers/clocksource/timer-mp-csky.c b/drivers/clocksource/timer-mp-csky.c
index 3cb6dbc88b6d8..183a9955160a8 100644
--- a/drivers/clocksource/timer-mp-csky.c
+++ b/drivers/clocksource/timer-mp-csky.c
@@ -97,7 +97,7 @@ static int csky_mptimer_dying_cpu(unsigned int cpu)
 /*
  * clock source
  */
-static u64 sched_clock_read(void)
+static u64 notrace sched_clock_read(void)
 {
 	return (u64)mfcr(PTIM_CCVR);
 }