AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

clocksource/drivers/vf_pit_timer: Prevent ftrace recursion

Browse Source 
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>
This commit is contained in:
Jisheng Zhang 2015-10-20 16:02:38 +08:00 committed by Daniel Lezcano
parent cdc68ec018
commit 36361abc8b
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/clocksource/vf_pit_timer.c
View File

@ -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);
}