From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Fri, 26 Dec 2008 05:24:10 +0000 (+0900)
Subject: proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c
X-Git-Tag: v3.12-rc1~16848^2~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=26ddd8d5cac8a563953d5febe8c6e40909f7bce1;p=kernel%2Fkernel-generic.git

proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c

Impact: cleanup

irq_desc can be NULL when CONFIG_SPARSE_IRQ=y only.
therefore, NULL checking can move into kstat_irqs_cpu() of SPARSE_IRQ version.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: "Yinghai Lu" <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 3bb1cf1..f75efa2 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -9,6 +9,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/time.h>
+#include <linux/irqnr.h>
 #include <asm/cputime.h>
 
 #ifndef arch_irq_stat_cpu
@@ -45,10 +46,6 @@ static int show_stat(struct seq_file *p, void *v)
 		steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 		guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
 		for_each_irq_nr(j) {
-#ifdef CONFIG_SPARSE_IRQ
-			if (!irq_to_desc(j))
-				continue;
-#endif
 			sum += kstat_irqs_cpu(j, i);
 		}
 		sum += arch_irq_stat_cpu(i);
@@ -95,12 +92,6 @@ static int show_stat(struct seq_file *p, void *v)
 	/* sum again ? it could be updated? */
 	for_each_irq_nr(j) {
 		per_irq_sum = 0;
-#ifdef CONFIG_SPARSE_IRQ
-		if (!irq_to_desc(j)) {
-			seq_printf(p, " %u", per_irq_sum);
-			continue;
-		}
-#endif
 		for_each_possible_cpu(i)
 			per_irq_sum += kstat_irqs_cpu(j, i);
 
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 4db7d2d..03479df 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -448,7 +448,7 @@ void early_init_irq_lock_class(void)
 unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
-	return desc->kstat_irqs[cpu];
+	return desc ? desc->kstat_irqs[cpu] : 0;
 }
 #endif
 EXPORT_SYMBOL(kstat_irqs_cpu);