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clocksource/drivers/fsl_ftm_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 ftm_read_sched_clock() function.

Fix this by adding the notrace attribute to this function.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
hifive-unleashed-5.1
Jisheng Zhang 2015-10-20 16:02:40 +08:00 committed by Daniel Lezcano
parent 36361abc8b
commit bd859a44b2
1 changed files with 1 additions and 1 deletions
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2
drivers/clocksource/fsl_ftm_timer.c
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@ -118,7 +118,7 @@ static inline void ftm_reset_counter(void __iomem *base)
ftm_writel(0x00, base + FTM_CNT);
}
static u64 ftm_read_sched_clock(void)
static u64 notrace ftm_read_sched_clock(void)
{
return ftm_readl(priv->clksrc_base + FTM_CNT);
}