In secondary_start_kernel() interrupts should be enabled with
local_irq_enable() after the cpu is marked as online with
set_cpu_online(). Otherwise it's possible for a timer interrupt to
trigger a softirq, which if the cpu is marked as offline may have it's
affinity altered.
Reported-by: Kirill Tkhai <tkhai@yandex.ru>
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>
Cc: Kirill Tkhai <tkhai@yandex.ru>
setup_priv();
- /*
- * Enable local interrupts.
- */
- tbi_startup_interrupt(TBID_SIGNUM_TRT);
notify_cpu_starting(cpu);
- local_irq_enable();
pr_info("CPU%u (thread %u): Booted secondary processor\n",
cpu, cpu_2_hwthread_id[cpu]);
set_cpu_online(cpu, true);
/*
+ * Enable local interrupts.
+ */
+ tbi_startup_interrupt(TBID_SIGNUM_TRT);
+ local_irq_enable();
+
+ /*
* OK, it's off to the idle thread for us
*/
cpu_startup_entry(CPUHP_ONLINE);