clocksource/drivers/pistachio: Prevent ftrace recursion
authorJisheng Zhang <jszhang@marvell.com>
Tue, 20 Oct 2015 08:02:36 +0000 (16:02 +0800)
committerDaniel Lezcano <daniel.lezcano@linaro.org>
Tue, 27 Oct 2015 00:33:18 +0000 (01:33 +0100)
commitf8af0e9c644caf64d0f42dce816c18346c744a9f
treeacc265ff78963bf83a18e14782af352d613d893f
parentd6df3576e6b4bcf765f5ace69915b4fa4a7ee1c3
clocksource/drivers/pistachio: Prevent ftrace recursion

Currently pistachio can be used as a scheduler clock. We properly marked
pistachio_read_sched_clock() as notrace but we then call another function
pistachio_clocksource_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 pistachio_clocksource_read_cycles()
function.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
drivers/clocksource/time-pistachio.c