Hi Sebastian,
On Tue, Mar 18, 2014 at 09:40:57PM +0000, Sebastian Capella wrote:
Use of tracers in local_irq_disable is causes abort loops when called with irqs disabled using a temporary stack. Replace local_irq_disable with raw_local_irq_disable instead to avoid tracers.
Do you have any more information about these aborts? At the time we call local_irq_disable, the stack is still intact, so if the issue is simply related to having any tracers active at the call_with_stack invocation, we'd be better off disabling tracing here altogether.
Will
Signed-off-by: Sebastian Capella sebastian.capella@linaro.org Cc: Russell King linux@arm.linux.org.uk Cc: Andrew Morton akpm@linux-foundation.org Cc: Will Deacon will.deacon@arm.com Cc: Robin Holt holt@sgi.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Konstantin Khlebnikov k.khlebnikov@samsung.com Cc: Steven Capper steve.capper@linaro.org Cc: Stephen Warren swarren@nvidia.com Cc: Tejun Heo tj@kernel.org
arch/arm/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 92f7b15..f58b723 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -100,7 +100,7 @@ void soft_restart(unsigned long addr) u64 *stack = soft_restart_stack + ARRAY_SIZE(soft_restart_stack); /* Disable interrupts first */
- local_irq_disable();
- raw_local_irq_disable(); local_fiq_disable();
/* Disable the L2 if we're the last man standing. */ -- 1.7.9.5