[PATCH] x86: eliminate unused irq0_irqs counter

[PATCH] x86: eliminate unused irq0_irqs counter

[Jan Beulich]

As of 2.6.38 this counter is being maintained without ever being read.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

---
 arch/x86/include/asm/hardirq.h |    1 -
 arch/x86/kernel/time.c         |    3 ---
 2 files changed, 4 deletions(-)

--- 3.3-rc4/arch/x86/include/asm/hardirq.h
+++ 3.3-rc4-x86-no-irq0_irqs/arch/x86/include/asm/hardirq.h
@@ -7,7 +7,6 @@
 typedef struct {
 	unsigned int __softirq_pending;
 	unsigned int __nmi_count;	/* arch dependent */
-	unsigned int irq0_irqs;
 #ifdef CONFIG_X86_LOCAL_APIC
 	unsigned int apic_timer_irqs;	/* arch dependent */
 	unsigned int irq_spurious_count;
--- 3.3-rc4/arch/x86/kernel/time.c
+++ 3.3-rc4-x86-no-irq0_irqs/arch/x86/kernel/time.c
@@ -57,9 +57,6 @@ EXPORT_SYMBOL(profile_pc);
  */
 static irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
-	/* Keep nmi watchdog up to date */
-	inc_irq_stat(irq0_irqs);
-
 	global_clock_event->event_handler(global_clock_event);
 
 	/* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */

[tip:timers/core] x86/time: Eliminate unused irq0_irqs counter

[tip-bot for Jan Beulich]

Commit-ID:  d93c4071b78f4676ef70ec8f2d4bae59b6cc5523
Gitweb:     http://git.kernel.org/tip/d93c4071b78f4676ef70ec8f2d4bae59b6cc5523
Author:     Jan Beulich <JBeulich@suse.com>
AuthorDate: Fri, 24 Feb 2012 11:50:27 +0000
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 27 Feb 2012 08:46:25 +0100

x86/time: Eliminate unused irq0_irqs counter

As of v2.6.38 this counter is being maintained without ever being
read.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/4F4787930200007800074A10@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/x86/include/asm/hardirq.h |    1 -
 arch/x86/kernel/time.c         |    3 ---
 2 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index da0b3ca..382f75d 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -7,7 +7,6 @@
 typedef struct {
 	unsigned int __softirq_pending;
 	unsigned int __nmi_count;	/* arch dependent */
-	unsigned int irq0_irqs;
 #ifdef CONFIG_X86_LOCAL_APIC
 	unsigned int apic_timer_irqs;	/* arch dependent */
 	unsigned int irq_spurious_count;
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
index dd5fbf4..c6eba2b 100644
--- a/arch/x86/kernel/time.c
+++ b/arch/x86/kernel/time.c
@@ -57,9 +57,6 @@ EXPORT_SYMBOL(profile_pc);
  */
 static irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
-	/* Keep nmi watchdog up to date */
-	inc_irq_stat(irq0_irqs);
-
 	global_clock_event->event_handler(global_clock_event);
 
 	/* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */