linux-kernel - Re: [PATCH]: MTRR: fix 32-bit ioctls on x64

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Date:	Tue, 16 Jan 2007 19:51:53 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Mikael Pettersson <mikpe@...uu.se>
CC:	giuliano.procida@...glemail.com, rgooch@...f.csiro.au,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH]: MTRR: fix 32-bit ioctls on x64_32

Mikael Pettersson wrote:
> 
> These #ifdefs are too ugly.
> 
> Since you apparently just add aliases for the case labels,
> and do no actual code changes, why not
> 1. make the new cases unconditional, or 
> 2. invoke a translation function before the switch which
>    maps the MTRRCIOC32_ constants to what the kernel uses
> 

Adding a case can add substantially to the generated code, especially if 
it makes a compact set of case labels non-compact.

	-hpa
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