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SubjectRe: [5/6] dynamically allocate IRQ stacks (was: Re: [-mm patch] i386: enable 4k stacks by default)
On Mon, 30 Apr 2007, William Lee Irwin III wrote:

> -static char softirq_stack[NR_CPUS * THREAD_SIZE]
> - __attribute__((__aligned__(THREAD_SIZE)));
> +static DEFINE_PER_CPU(char *, softirq_stack);
> +static DEFINE_PER_CPU(char *, hardirq_stack);
>
> -static char hardirq_stack[NR_CPUS * THREAD_SIZE]
> - __attribute__((__aligned__(THREAD_SIZE)));
> +#ifdef CONFIG_VMALLOC_STACK
> +static void * __init __alloc_irqstack(int cpu)

How about just using DEFINE_PER_CPU and allowing the percpu code
dynamically allocate.
-
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