Re: 2.6.1-rc1 compile error

[Juergen Hasch]

Am Mittwoch, 31. Dezember 2003 15:09 schrieb Srihari Vijayaraghavan:
>
>
> Then it compiled the io_apic.c and progressed (maybe a lot). But it failed
> and showed this error message:
>   LD      .tmp_vmlinux1
>
> arch/i386/pci/built-in.o(.text+0xc6e): In function `pcibios_lookup_irq':
> : undefined reference to `can_request_irq'
>
> make: *** [.tmp_vmlinux1] Error 1
>

This is obviously due to can_request_irq is found in arch/i386/kernel/irq.c
and the x86_64 build just includes some stuff from arch/i386/pci/irq.c where
can_request_irq is used too. 

Linus introduced this function a few weeks ago. I used the patch below to move 
the function from kernel/irq.c to pci/irq.c, but he will probably fix it
himself soon.

Btw. there are a lot of other fixes for the x86_64 build from Andi Kleen which
you should apply too. However, they don't apply cleanly anymore.

...Juergen
--- arch/i386/kernel/irq.c.orig	2004-01-01 10:06:00.000000000 +0100
+++ arch/i386/kernel/irq.c	2003-12-31 13:13:58.000000000 +0100
@@ -511,19 +511,6 @@
 	return 1;
 }
 
-int can_request_irq(unsigned int irq, unsigned long irqflags)
-{
-	struct irqaction *action;
-
-	if (irq >= NR_IRQS)
-		return 0;
-	action = irq_desc[irq].action;
-	if (action) {
-		if (irqflags & action->flags & SA_SHIRQ)
-			action = NULL;
-	}
-	return !action;
-}
 
 /**
  *	request_irq - allocate an interrupt line
--- arch/i386/pci/irq.c.orig	2004-01-01 10:06:42.000000000 +0100
+++ arch/i386/pci/irq.c	2003-12-31 13:24:35.000000000 +0100
@@ -939,6 +939,20 @@
 	pirq_penalty[irq] += 100;
 }
 
+int can_request_irq(unsigned int irq, unsigned long irqflags)
+{
+       struct irqaction *action;
+
+       if (irq >= NR_IRQS)
+               return 0;
+       action = irq_desc[irq].action;
+       if (action) {
+               if (irqflags & action->flags & SA_SHIRQ)
+                       action = NULL;
+       }
+       return !action;
+}
+
 int pirq_enable_irq(struct pci_dev *dev)
 {
 	u8 pin;