Commits
James Hogan committed 8b8b2412994
metag: cpu hotplug: route_irq: preserve irq mask The route_irq() function needs to preserve the irq mask by using the _irqsave/irqrestore variants of raw spin lock functions instead of the _irq variants. This is because it is called from __cpu_disable() (via migrate_irqs()), which is called with IRQs disabled, so using the _irq variants re-enables IRQs. This appears to have been causing occasional hits of the BUG_ON(!irqs_disabled()) in __irq_work_run() during CPU hotplug soak testing: BUG: failure at kernel/irq_work.c:122/__irq_work_run()! Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>