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Commit 83d4e6e7 authored by Andreas Mohr's avatar Andreas Mohr Committed by Linus Torvalds
Browse files

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



Signed-off-by: default avatarAndreas Mohr <andi@lisas.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e6022603

arch/arm/kernel/irq.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

}

kernel/irq/spurious.c

+6 −6
Original line number Diff line number Diff line
@@ -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)

{