x86/irq: Remove offline cpus from vector cleanup

No point of keeping offline cpus in the cleanup mask.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jeremiah Mahler <jmmahler@gmail.com>
Cc: andy.shevchenko@gmail.com
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org #4.3+
Link: http://lkml.kernel.org/r/20151231160106.808642683@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index fccfa3f..68d18b3 100644 (file)
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -202,8 +202,12 @@ next_cpu:
        return -ENOSPC;
 
 update:
-       /* Cleanup required ? */
-       d->move_in_progress = cpumask_intersects(d->old_domain, cpu_online_mask);
+       /*
+        * Exclude offline cpus from the cleanup mask and set the
+        * move_in_progress flag when the result is not empty.
+        */
+       cpumask_and(d->old_domain, d->old_domain, cpu_online_mask);
+       d->move_in_progress = !cpumask_empty(d->old_domain);
        d->cfg.vector = vector;
        cpumask_copy(d->domain, vector_cpumask);
 success: