[PATCH] make noirqdebug/irqfixup __read_mostly, add (un)likely()

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index bcc19fb..ec20f89 100644 (file)
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -52,7 +52,7 @@
  */
 #define MAX_IRQ_CNT    100000
 
-static int noirqdebug;
+static int noirqdebug __read_mostly;
 static volatile unsigned long irq_err_count;
 static DEFINE_SPINLOCK(irq_controller_lock);
 static LIST_HEAD(irq_pending);
@@ -81,7 +81,7 @@ irqreturn_t no_action(int irq, void *dev_id, struct pt_regs *regs)
 
 void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
 {
-       irq_err_count += 1;
+       irq_err_count++;
        printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
 }
 

diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 7df9abd..b2fb3c1 100644 (file)
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -11,7 +11,7 @@
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 
-static int irqfixup;
+static int irqfixup __read_mostly;
 
 /*
  * Recovery handler for misrouted interrupts.
@@ -136,9 +136,9 @@ static void report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t actio
 void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
                        struct pt_regs *regs)
 {
-       if (action_ret != IRQ_HANDLED) {
+       if (unlikely(action_ret != IRQ_HANDLED)) {
                desc->irqs_unhandled++;
-               if (action_ret != IRQ_NONE)
+               if (unlikely(action_ret != IRQ_NONE))
                        report_bad_irq(irq, desc, action_ret);
        }
 
@@ -152,11 +152,11 @@ void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
        }
 
        desc->irq_count++;
-       if (desc->irq_count < 100000)
+       if (likely(desc->irq_count < 100000))
                return;
 
        desc->irq_count = 0;
-       if (desc->irqs_unhandled > 99900) {
+       if (unlikely(desc->irqs_unhandled > 99900)) {
                /*
                 * The interrupt is stuck
                 */
@@ -171,7 +171,7 @@ void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
        desc->irqs_unhandled = 0;
 }
 
-int noirqdebug;
+int noirqdebug __read_mostly;
 
 int __init noirqdebug_setup(char *str)
 {