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ARM: 7700/2: Make cpu_init() notrace

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On resume from CPU power down any trace hooks enabled in cpu_init()
will get called before that function has done set_my_cpu_offset(),
so any use of per-cpu variables by trace hook code will cause bad
things to happen. Prevent this by marking the function notrace.

This fixes lockups/crashes seen when enabling function tracer on TC2
with the not yet mainlined cpuidle driver.

Signed-off-by: Jon Medhurst <tixy@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jon Medhurst 2013-04-25 14:40:22 +01:00 committed by Russell King
parent 3eb0be3042
commit 1783d45746
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/setup.c
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@ -389,7 +389,7 @@ static void __init feat_v6_fixup(void)
*
* cpu_init sets up the per-CPU stacks.
*/
void cpu_init(void)
void notrace cpu_init(void)
{
unsigned int cpu = smp_processor_id();
struct stack *stk = &stacks[cpu];