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| author | Jisheng Zhang <jszhang@marvell.com> | 2015-10-20 16:02:40 +0800 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2015-10-27 01:34:07 +0100 |
| commit | bd859a44b2f6749fd82e89dabbaa37f2c8aa33fe (patch) | |
| tree | b28a06dc5355d944329f3f43837289d0505a5cfc /drivers/clocksource/fsl_ftm_timer.c | |
| parent | 36361abc8bc14e80f6b4db561665e5e15249c181 (diff) | |
| download | lwn-bd859a44b2f6749fd82e89dabbaa37f2c8aa33fe.tar.gz lwn-bd859a44b2f6749fd82e89dabbaa37f2c8aa33fe.zip | |
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>
Diffstat (limited to 'drivers/clocksource/fsl_ftm_timer.c')
| -rw-r--r-- | drivers/clocksource/fsl_ftm_timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c index ef434699c80a..10202f1fdfd7 100644 --- a/drivers/clocksource/fsl_ftm_timer.c +++ b/drivers/clocksource/fsl_ftm_timer.c @@ -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); } |