Re: [PATCH 1/2] irq_flags_t: intro and core annotations

From: Andrew Morton
Date: Mon Oct 22 2007 - 14:27:39 EST


On Mon, 22 Oct 2007 16:29:12 +0100 Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote:

> On Sun, Oct 21, 2007 at 01:30:42PM +0400, Alexey Dobriyan wrote:
>
> > irq_flags_t
> >
> > New type for use with spin_lock_irqsave() and friends.
>
> Talking about it, why did we ever require this to be a long anyway? I could
> get away with a single bit for MIPS; the rest of this variable is pure
> bloat. An abstract datatype could help finally fix this.
>

Yes, it's always been ugly that we use unsigned long for this rather than
abstracting it properly.

However I'd prefer that we have some really good reason for introducing
irq_flags_t now. Simply so that I don't needlessly spend the next two
years wrestling with literally thousands of convert-to-irq_flags_t patches
and having to type "please use irq_flags_t here" in hundreds of patch
reviews. (snivel, wimper)
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