genirq: Remove pointless gfp argument

All callers hand in GPF_KERNEL. No point to have an extra argument for
that.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235446.082544752@linutronix.de

kernel/irq/irqdesc.c

@@ -54,14 +54,14 @@ static void __init init_irq_default_affinity(void)
 #endif
 
 #ifdef CONFIG_SMP
-static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
+static int alloc_masks(struct irq_desc *desc, int node)
 {
 	if (!zalloc_cpumask_var_node(&desc->irq_common_data.affinity,
-				     gfp, node))
+				     GFP_KERNEL, node))
 		return -ENOMEM;
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
-	if (!zalloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
+	if (!zalloc_cpumask_var_node(&desc->pending_mask, GFP_KERNEL, node)) {
 		free_cpumask_var(desc->irq_common_data.affinity);
 		return -ENOMEM;
 	}
@@ -86,7 +86,7 @@ static void desc_smp_init(struct irq_desc *desc, int node,
 
 #else
 static inline int
-alloc_masks(struct irq_desc *desc, gfp_t gfp, int node) { return 0; }
+alloc_masks(struct irq_desc *desc, int node) { return 0; }
 static inline void
 desc_smp_init(struct irq_desc *desc, int node, const struct cpumask *affinity) { }
 #endif
@@ -344,9 +344,8 @@ static struct irq_desc *alloc_desc(int irq, int node, unsigned int flags,
 				   struct module *owner)
 {
 	struct irq_desc *desc;
-	gfp_t gfp = GFP_KERNEL;
 
-	desc = kzalloc_node(sizeof(*desc), gfp, node);
+	desc = kzalloc_node(sizeof(*desc), GFP_KERNEL, node);
 	if (!desc)
 		return NULL;
 	/* allocate based on nr_cpu_ids */
@@ -354,7 +353,7 @@ static struct irq_desc *alloc_desc(int irq, int node, unsigned int flags,
 	if (!desc->kstat_irqs)
 		goto err_desc;
 
-	if (alloc_masks(desc, gfp, node))
+	if (alloc_masks(desc, node))
 		goto err_kstat;
 
 	raw_spin_lock_init(&desc->lock);
@@ -525,7 +524,7 @@ int __init early_irq_init(void)
 
 	for (i = 0; i < count; i++) {
 		desc[i].kstat_irqs = alloc_percpu(unsigned int);
-		alloc_masks(&desc[i], GFP_KERNEL, node);
+		alloc_masks(&desc[i], node);
 		raw_spin_lock_init(&desc[i].lock);
 		lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
 		desc_set_defaults(i, &desc[i], node, NULL, NULL);