linux-kernel - [PATCH 13/14] clocksource/drivers/c-sky: fixup ftrace call-graph panic

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Date:   Mon, 31 Dec 2018 23:27:04 +0800
From:   guoren@...nel.org
To:     daniel.lezcano@...aro.org, tglx@...utronix.de
Cc:     guoren@...nel.org, linux-kernel@...r.kernel.org,
        Guo Ren <ren_guo@...ky.com>
Subject: [PATCH 13/14] clocksource/drivers/c-sky: fixup ftrace call-graph panic

From: Guo Ren <ren_guo@...ky.com>

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

Signed-off-by: Guo Ren <ren_guo@...ky.com>
---
 drivers/clocksource/timer-mp-csky.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-mp-csky.c b/drivers/clocksource/timer-mp-csky.c
index 3cb6dbc..183a995 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);
 }
-- 
2.7.4