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| author | Jisheng Zhang <jszhang@marvell.com> | 2015-10-20 16:02:38 +0800 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2015-10-27 01:33:58 +0100 |
| commit | 36361abc8bc14e80f6b4db561665e5e15249c181 (patch) | |
| tree | 60236a7ba6de57c3a5df7d52730d49139360f8f4 | |
| parent | cdc68ec01853baf3558c6d25f19c869add4a6888 (diff) | |
| download | linux-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.c | 2 |
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); } |