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 3cb6dbc88b6d8bea5d339503c4f38d53f7f86b4a..183a9955160a80dd89bdc2d2c82cd358a487c6e9 100644 (file)
--- 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);
 }