genirq/cpuhotplug: Convert to lock guards

Convert all lock/unlock pairs to guards and tidy up the code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20250429065420.560083665@linutronix.de

Author: KAGA-KOKO

kernel/irq/cpuhotplug.c

@@ -177,9 +177,8 @@ void irq_migrate_all_off_this_cpu(void)
 		bool affinity_broken;
 
 		desc = irq_to_desc(irq);
-		raw_spin_lock(&desc->lock);
-		affinity_broken = migrate_one_irq(desc);
-		raw_spin_unlock(&desc->lock);
+		scoped_guard(raw_spinlock, &desc->lock)
+			affinity_broken = migrate_one_irq(desc);
 
 		if (affinity_broken) {
 			pr_debug_ratelimited("IRQ %u: no longer affine to CPU%u\n",
@@ -244,9 +243,8 @@ int irq_affinity_online_cpu(unsigned int cpu)
 	irq_lock_sparse();
 	for_each_active_irq(irq) {
 		desc = irq_to_desc(irq);
-		raw_spin_lock_irq(&desc->lock);
-		irq_restore_affinity_of_irq(desc, cpu);
-		raw_spin_unlock_irq(&desc->lock);
+		scoped_guard(raw_spinlock, &desc->lock)
+			irq_restore_affinity_of_irq(desc, cpu);
 	}
 	irq_unlock_sparse();