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SubjectRe: sparse_irq: userspace ABI breakage in -tip tree
On Fri, Sep 19, 2008 at 3:53 PM, Arjan van de Ven <arjan@infradead.org> wrote:
>
> commit 70426a06a58561c401e64c5767d71a011d4b978b
> Author: Yinghai Lu <yhlu.kernel@gmail.com>
> Date: Tue Aug 19 20:50:27 2008 -0700
>
> x86: make 32 bit to use sparse_irq
>
> @@ -285,7 +303,7 @@ int show_interrupts(struct seq_file *p, void *v)
> action = desc->action;
> if (!action && !any_count)
> goto skip;
> - seq_printf(p, "%3d: ",i);
> + seq_printf(p, "%#x: ",i);
> #ifndef CONFIG_SMP
> seq_printf(p, "%10u ", kstat_irqs(i));
> #else
>
>
> this is a userspace ABI breakage; you're changing /proc/interrupts from
> decimal to hex! This file is used by both humans and computer programs,
> and the humans will get confused, but the computer programs will break.
> Not a good idea to put into mainline.

change back to decimal could help?

>
> (I'm not so convinced of sparse_irq as a whole to be honest, but that's
> a different story)

anything need to be addressed?

YH


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