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* [PATCH] parisc: Hide SMP irq accounting on UP systems
@ 2019-01-04 23:36 Helge Deller
  0 siblings, 0 replies; 1+ messages in thread
From: Helge Deller @ 2019-01-04 23:36 UTC (permalink / raw)
  To: linux-parisc, James Bottomley, John David Anglin

Hide Rescheduling (RES) and Function call (CAL) interrupts when
running a UP machine.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index fd6d8739e145..6f19f364c20a 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -175,14 +175,16 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 # endif
 #endif
 #ifdef CONFIG_SMP
-	seq_printf(p, "%*s: ", prec, "RES");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
-	seq_puts(p, "  Rescheduling interrupts\n");
-	seq_printf(p, "%*s: ", prec, "CAL");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
-	seq_puts(p, "  Function call interrupts\n");
+	if (num_online_cpus() > 1) {
+		seq_printf(p, "%*s: ", prec, "RES");
+		for_each_online_cpu(j)
+			seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
+		seq_puts(p, "  Rescheduling interrupts\n");
+		seq_printf(p, "%*s: ", prec, "CAL");
+		for_each_online_cpu(j)
+			seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
+		seq_puts(p, "  Function call interrupts\n");
+	}
 #endif
 	seq_printf(p, "%*s: ", prec, "UAH");
 	for_each_online_cpu(j)

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2019-01-04 23:36 [PATCH] parisc: Hide SMP irq accounting on UP systems Helge Deller

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