cobalt/intr: Fix cpumask argument type of xnintr_affinity

Passing a potentially large mask by value was a bad idea of I-pipe.
Dovetail uses the kernel API, and that does it right. So adjust our
internal abstraction - which is unused so far anyway.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

include/cobalt/kernel/intr.h

@@ -125,7 +125,7 @@ void xnintr_enable(struct xnintr *intr);
 void xnintr_disable(struct xnintr *intr);
 
 void xnintr_affinity(struct xnintr *intr,
-		     cpumask_t cpumask);
+		     const cpumask_t *cpumask);
 
 #ifdef CONFIG_XENO_OPT_STATS_IRQS
 

kernel/cobalt/dovetail/intr.c

@@ -118,12 +118,12 @@ void xnintr_disable(struct xnintr *intr)
 }
 EXPORT_SYMBOL_GPL(xnintr_disable);
 
-void xnintr_affinity(struct xnintr *intr, cpumask_t cpumask)
+void xnintr_affinity(struct xnintr *intr, const cpumask_t *cpumask)
 {
 	int ret;
 
 	secondary_mode_only();
-	ret = irq_set_affinity_hint(intr->irq, &cpumask);
+	ret = irq_set_affinity_hint(intr->irq, cpumask);
 
 	WARN_ON_ONCE(ret);
 }

kernel/cobalt/ipipe/intr.c

@@ -992,11 +992,11 @@ EXPORT_SYMBOL_GPL(xnintr_disable);
  *
  * @coretags{secondary-only}
  */
-void xnintr_affinity(struct xnintr *intr, cpumask_t cpumask)
+void xnintr_affinity(struct xnintr *intr, const cpumask_t *cpumask)
 {
 	secondary_mode_only();
 #ifdef CONFIG_SMP
-	ipipe_set_irq_affinity(intr->irq, cpumask);
+	ipipe_set_irq_affinity(intr->irq, *cpumask);
 #endif
 }
 EXPORT_SYMBOL_GPL(xnintr_affinity);