cpumask: make irq_set_affinity() take a const struct cpumask

Impact: change existing irq_chip API

Not much point with gentle transition here: the struct irq_chip's
setaffinity method signature needs to change.

Fortunately, not widely used code, but hits a few architectures.

Note: In irq_select_affinity() I save a temporary in by mangling
irq_desc[irq].affinity directly.  Ingo, does this break anything?

(Folded in fix from KOSAKI Motohiro)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Acked-by: Ingo Molnar <mingo@redhat.com>
Cc: ralf@linux-mips.org
Cc: grundler@parisc-linux.org
Cc: jeremy@xensource.com
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 5c4674ae8aea..c8adecd5b416 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -330,25 +330,25 @@ unmask_irq (unsigned int irq)
 
 
 static void
-iosapic_set_affinity (unsigned int irq, cpumask_t mask)
+iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
 #ifdef CONFIG_SMP
         u32 high32, low32;
-        int dest, rte_index;
+        int cpu, dest, rte_index;
         int redir = (irq & IA64_IRQ_REDIRECTED) ? 1 : 0;
         struct iosapic_rte_info *rte;
         struct iosapic *iosapic;
 
         irq &= (~IA64_IRQ_REDIRECTED);
 
-        cpus_and(mask, mask, cpu_online_map);
-        if (cpus_empty(mask))
+        cpu = cpumask_first_and(cpu_online_mask, mask);
+        if (cpu >= nr_cpu_ids)
                 return;
 
-        if (irq_prepare_move(irq, first_cpu(mask)))
+        if (irq_prepare_move(irq, cpu))
                 return;
 
-        dest = cpu_physical_id(first_cpu(mask));
+        dest = cpu_physical_id(cpu);
 
         if (!iosapic_intr_info[irq].count)
                 return;                 /* not an IOSAPIC interrupt */