linux-kernel - Re: [PATCH 08/42] introduce nr

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Message-ID: <86802c440808091437j3d3b9fcexa4e2da2b981868e8@mail.gmail.com>
Date:	Sat, 9 Aug 2008 14:37:53 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
	"Mike Travis" <travis@....com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/42] introduce nr_irqs

On Sat, Aug 9, 2008 at 8:46 AM, Eric W. Biederman <ebiederm@...ssion.com> wrote:
> "Yinghai Lu" <yhlu.kernel@...il.com> writes:
>
>
>> ok, will move to that file.
>
> ????   If you introduce a new concept like valid_irq that is fine.
> interrupt.h is the interface to drivers!
>
> Let me say this clearly.
>
> DO NOT CHANGE THE INTERFACE TO DEVICE DRIVERS!
>
please check

Index: linux-2.6/include/linux/interrupt.h
===================================================================
--- linux-2.6.orig/include/linux/interrupt.h
+++ linux-2.6/include/linux/interrupt.h
@@ -15,6 +15,8 @@
 #include <asm/ptrace.h>
 #include <asm/system.h>

+extern int nr_irqs;
+
 /*
  * These correspond to the IORESOURCE_IRQ_* defines in
  * linux/ioport.h to select the interrupt line behaviour.  When
Index: linux-2.6/arch/m68k/kernel/ints.c
===================================================================
--- linux-2.6.orig/arch/m68k/kernel/ints.c
+++ linux-2.6/arch/m68k/kernel/ints.c
@@ -46,6 +46,8 @@
 #include <asm/q40ints.h>
 #endif

+int nr_irqs = NR_IRQS;
+
 extern u32 auto_irqhandler_fixup[];
 extern u32 user_irqhandler_fixup[];
 extern u16 user_irqvec_fixup[];
Index: linux-2.6/arch/s390/kernel/irq.c
===================================================================
--- linux-2.6.orig/arch/s390/kernel/irq.c
+++ linux-2.6/arch/s390/kernel/irq.c
@@ -17,6 +17,8 @@
 #include <linux/proc_fs.h>
 #include <linux/profile.h>

+int nr_irqs = NR_IRQS;
+
 /*
  * show_interrupts is needed by /proc/interrupts.
  */
Index: linux-2.6/arch/sparc/kernel/irq.c
===================================================================
--- linux-2.6.orig/arch/sparc/kernel/irq.c
+++ linux-2.6/arch/sparc/kernel/irq.c
@@ -55,6 +55,9 @@
 #define SMP_NOP2
 #define SMP_NOP3
 #endif /* SMP */
+
+int nr_irqs = NR_IRQS;
+
 unsigned long __raw_local_irq_save(void)
 {
        unsigned long retval;
Index: linux-2.6/kernel/irq/handle.c
===================================================================
--- linux-2.6.orig/kernel/irq/handle.c
+++ linux-2.6/kernel/irq/handle.c
@@ -47,6 +47,7 @@ handle_bad_irq(unsigned int irq, struct
  *
  * Controller mappings for all interrupt sources:
  */
+int nr_irqs = NR_IRQS;
 struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
        [0 ... NR_IRQS-1] = {
                .status = IRQ_DISABLED,
--
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