genirq/affinity: Use default affinity mask for reserved vectors

The reserved vectors at the beginning and the end of the vector space get
cpu_possible_mask assigned as their affinity mask.

All other non-auto affine interrupts get the default irq affinity mask
assigned. Using cpu_possible_mask breaks that rule.

Treat them like any other interrupt and use irq_default_affinity as target
mask.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>

kernel/irq/affinity.c

@@ -75,7 +75,7 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
 
 	/* Fill out vectors at the beginning that don't need affinity */
 	for (curvec = 0; curvec < affd->pre_vectors; curvec++)
-		cpumask_copy(masks + curvec, cpu_possible_mask);
+		cpumask_copy(masks + curvec, irq_default_affinity);
 
 	/* Stabilize the cpumasks */
 	get_online_cpus();
@@ -130,7 +130,7 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
 
 	/* Fill out vectors at the end that don't need affinity */
 	for (; curvec < nvecs; curvec++)
-		cpumask_copy(masks + curvec, cpu_possible_mask);
+		cpumask_copy(masks + curvec, irq_default_affinity);
 out:
 	free_cpumask_var(nmsk);
 	return masks;