linux-kernel - Re: [PATCH 03/12] hdaps: Unify and cache hdaps readouts

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Message-ID: <20060807232415.GE2759@elf.ucw.cz>
Date:	Tue, 8 Aug 2006 01:24:15 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Shem Multinymous <multinymous@...il.com>
Cc:	Robert Love <rlove@...ve.org>, Jean Delvare <khali@...ux-fr.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, hdaps-devel@...ts.sourceforge.net
Subject: Re: [PATCH 03/12] hdaps: Unify and cache hdaps readouts

Hi!

> >> +     /* Parse position data: */
> >> +     pos_x = *(s16*)(data.val+EC_ACCEL_IDX_XPOS1) * (hdaps_invert?-1:1);
> >> +     pos_y = *(s16*)(data.val+EC_ACCEL_IDX_YPOS1) * (hdaps_invert?-1:1);
> >> +
> >> +     /* Parse so-called "variance" data: */
> >> +     var_x = *(s16*)(data.val+EC_ACCEL_IDX_XPOS2) * (hdaps_invert?-1:1);
> >> +     var_y = *(s16*)(data.val+EC_ACCEL_IDX_YPOS2) * (hdaps_invert?-1:1);
> >
> >Perhaps hdaps_invert should already have 1/-1 values.
> 
> It's also used as a module parameter, which is 0/1 in mainline. I
> don't think this is worth extra code.

Okay, so what about ..

#define CONVERT(x) *(s16*)(data.val+x) * (hdaps_invert?-1:1);

...or better inline function?

								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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