linux-kernel - Re: [patch 6/6] fbdev: c2p - Rename c2p to c2p

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Date:	Tue, 23 Dec 2008 09:02:24 +0100 (CET)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	schmitz@...l.biophys.uni-duesseldorf.de,
	linux-fbdev-devel@...ts.sourceforge.net,
	linux-m68k@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 6/6] fbdev: c2p - Rename c2p to c2p_planar and correct
 indentation

On Mon, 22 Dec 2008, Andrew Morton wrote:
> On Sun, 21 Dec 2008 16:01:05 +0100
> Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> 
> > +    /*
> > +     *  Store a full block of planar data after c2p conversion
> > +     */
> > +
> > +static inline void store_planar(void *dst, u32 dst_inc, u32 bpp, u32 d[8])
> > +{
> > +	int i;
> > +
> > +	for (i = 0; i < bpp; i++, dst += dst_inc)
> > +		*(u32 *)dst = d[perm_c2p_32x8[i]];
> > +}
> > +
> > +
> > +    /*
> > +     *  Store a partial block of planar data after c2p conversion
> > +     */
> > +
> > +static inline void store_planar_masked(void *dst, u32 dst_inc, u32 bpp,
> > +				       u32 d[8], u32 mask)
> > +{
> > +	int i;
> > +
> > +	for (i = 0; i < bpp; i++, dst += dst_inc)
> > +		*(u32 *)dst = comp(d[perm_c2p_32x8[i]], *(u32 *)dst, mask);
> > +}
> 
> Why not just make the first arg of these (too large to be inlined)
> functions have type u32*, then do away with the casts?

If I make dst u32 *, then "dst += dst_inc" needs even more ugly casting
(dst_inc is not always a multiple of 4).

Anyway, as it may be an unaligned access, I'll switch to {get,put}_unaligned(),
which has the side effect of hiding the casts.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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