sparseirq: fix Alpha build failure

Impact: build fix on Alpha

-tip testing found this build failure on the Alpha defconfig:

/home/mingo/tip/fs/proc/stat.c: In function 'show_stat':
/home/mingo/tip/fs/proc/stat.c:48: error: implicit declaration of function 'for_each_irq_desc'
/home/mingo/tip/fs/proc/stat.c:48: error: expected ';' before '{' token

can not use irq_desc() in stat.c on older architectures.

Signed-off-by: Yinghai Lu <yinghai@kernel.orgg>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 7 deletions

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index a13431ab7c65..3cb9492801c0 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -45,9 +45,12 @@ static int show_stat(struct seq_file *p, void *v)
                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
                 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
-                for_each_irq_desc(j, desc) {
+                for_each_irq_nr(j) {
+#ifdef CONFIG_SPARSE_IRQ
+                        desc = irq_to_desc(j);
                         if (!desc)
                                 continue;
+#endif
                         sum += kstat_irqs_cpu(j, i);
                 }
                 sum += arch_irq_stat_cpu(i);
@@ -92,14 +95,17 @@ static int show_stat(struct seq_file *p, void *v)
         seq_printf(p, "intr %llu", (unsigned long long)sum);
 
         /* sum again ? it could be updated? */
-        for (j = 0; j < NR_IRQS; j++) {
-                desc = irq_to_desc(j);
+        for_each_irq_nr(j) {
                 per_irq_sum = 0;
-
-                if (desc) {
-                        for_each_possible_cpu(i)
-                                per_irq_sum += kstat_irqs_cpu(j, i);
+#ifdef CONFIG_SPARSE_IRQ
+                desc = irq_to_desc(j);
+                if (!desc) {
+                        seq_printf(p, " %u", per_irq_sum);
+                        continue;
                 }
+#endif
+                for_each_possible_cpu(i)
+                        per_irq_sum += kstat_irqs_cpu(j, i);
 
                 seq_printf(p, " %u", per_irq_sum);
         }