irqchip/riscv-aplic-direct: Avoid explicit cpumask allocation on stack

In general it's preferable to avoid placing cpumasks on the stack, as
for large values of NR_CPUS these can consume significant amounts of
stack space and make stack overflows more likely.

Use cpumask_first_and_and() to avoid the need for a temporary cpumask on
the stack.

Signed-off-by: Dawei Li <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Dawei Li

drivers/irqchip/irq-riscv-aplic-direct.c

@@ -54,15 +54,12 @@ static int aplic_direct_set_affinity(struct irq_data *d, const struct cpumask *m
 	struct aplic_direct *direct = container_of(priv, struct aplic_direct, priv);
 	struct aplic_idc *idc;
 	unsigned int cpu, val;
-	struct cpumask amask;
 	void __iomem *target;
 
-	cpumask_and(&amask, &direct->lmask, mask_val);
-
 	if (force)
-		cpu = cpumask_first(&amask);
+		cpu = cpumask_first_and(&direct->lmask, mask_val);
 	else
-		cpu = cpumask_any_and(&amask, cpu_online_mask);
+		cpu = cpumask_first_and_and(&direct->lmask, mask_val, cpu_online_mask);
 
 	if (cpu >= nr_cpu_ids)
 		return -EINVAL;