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Description of problem:
When I manually configure the kernel for my personal setup using the kernel source package with the 8K kernel stack option, I get link errors saying that it cannot find irq_ctx_init().
I have traced this to some weird #ifdef/#ifndef CONFIG_XEN statements in include/asm-i386/irq.h.
The #ifdefs may help in compiling the XEN kernels, but if you configure 8K stacks you can't link normal kernels.
The patch introducing the change is called: linux-2.6.9-xen-compile.patch



Version-Release number of selected component (if applicable):
kernel-2.6.11-1.1170_FC4

How reproducible:
Always

Steps to Reproduce:
1. Configure 8K stack with menu config or any config tool
2. Build kernel
3.
    

Actual Results:  Link failure on missing symbol: irq_ctx_init

Expected Results:  Linked linux kernel

Additional info:

After reverting the part of the patch below, the kernel compiles and links fine.
--- linux-2.6.9/include/asm-i386/irq.h~ 2004-12-24 01:46:10.908739264 -0500
+++ linux-2.6.9/include/asm-i386/irq.h  2004-12-24 01:48:25.183326424 -0500
@@ -28,10 +28,14 @@ extern void release_vm86_irqs(struct tas
 #endif

 #ifdef CONFIG_4KSTACKS
+ #ifndef CONFIG_XEN
   extern void irq_ctx_init(int cpu);
 # define __ARCH_HAS_DO_SOFTIRQ
+ #endif
 #else
+ #ifdef CONFIG_XEN
 # define irq_ctx_init(cpu) do { } while (0)
+ #endif
 #endif

 #ifdef CONFIG_IRQBALANCE