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authorJisheng Zhang <jszhang@marvell.com>2015-10-20 16:02:38 +0800
committerDaniel Lezcano <daniel.lezcano@linaro.org>2015-10-27 01:33:58 +0100
commit36361abc8bc14e80f6b4db561665e5e15249c181 (patch)
tree60236a7ba6de57c3a5df7d52730d49139360f8f4
parentcdc68ec01853baf3558c6d25f19c869add4a6888 (diff)
downloadlinux-36361abc8bc14e80f6b4db561665e5e15249c181.tar.bz2
clocksource/drivers/vf_pit_timer: Prevent ftrace recursion
Having a traceable function in the sched_clock() path leads to a recursion within ftrace and a kernel crash. We should not trace the pit_read_sched_clock() function. Fix this by adding a notrace attribute to this function. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r--drivers/clocksource/vf_pit_timer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index f07ba9932171..a0e6c68536a1 100644
--- a/drivers/clocksource/vf_pit_timer.c
+++ b/drivers/clocksource/vf_pit_timer.c
@@ -52,7 +52,7 @@ static inline void pit_irq_acknowledge(void)
__raw_writel(PITTFLG_TIF, clkevt_base + PITTFLG);
}
-static u64 pit_read_sched_clock(void)
+static u64 notrace pit_read_sched_clock(void)
{
return ~__raw_readl(clksrc_base + PITCVAL);
}