Commit-ID: 3aa601492babdf3acdec89e5aa9c44e1a357a4d8 Gitweb: http://git.kernel.org/tip/3aa601492babdf3acdec89e5aa9c44e1a357a4d8 Author: Jisheng Zhang <jszh...@marvell.com> AuthorDate: Thu, 22 Sep 2016 15:56:21 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Thu, 22 Sep 2016 16:49:19 +0200
clocksource/drivers/ti-32k: Prevent ftrace recursion Currently ti-32k can be used as a scheduler clock. We properly marked omap_32k_read_sched_clock() as notrace but we then call another function ti_32k_read_cycles() that _wasn't_ notrace. Having a traceable function in the sched_clock() path leads to a recursion within ftrace and a kernel crash. Fix this by adding notrace attribute to the ti_32k_read_cycles() function. Signed-off-by: Jisheng Zhang <jszh...@marvell.com> Cc: daniel.lezc...@linaro.org Cc: linux-arm-ker...@lists.infradead.org Cc: Steven Rostedt <rost...@goodmis.org> Link: http://lkml.kernel.org/r/20160922075621.3725-1-jszh...@marvell.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- drivers/clocksource/timer-ti-32k.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-ti-32k.c b/drivers/clocksource/timer-ti-32k.c index 92b7e39..cf5b14e 100644 --- a/drivers/clocksource/timer-ti-32k.c +++ b/drivers/clocksource/timer-ti-32k.c @@ -65,7 +65,7 @@ static inline struct ti_32k *to_ti_32k(struct clocksource *cs) return container_of(cs, struct ti_32k, cs); } -static cycle_t ti_32k_read_cycles(struct clocksource *cs) +static cycle_t notrace ti_32k_read_cycles(struct clocksource *cs) { struct ti_32k *ti = to_ti_32k(cs);
