Re: [RFC] Normalizing byteorder/unaligned access API

[Geert Uytterhoeven <geert@linux-m68k.org>]

On Tue, 7 Oct 2008, Harvey Harrison wrote:
> On Tue, 2008-10-07 at 17:33 -0600, Matthew Wilcox wrote:
> > On Tue, Oct 07, 2008 at 03:39:25PM -0700, Harvey Harrison wrote:
> > > As an example, in the write command handling in achba.c, a patch similar to the following
> > > (assumes the existence of a __be24 type somewhere):
> > 
> > What type could be defined to be '__be24'?  Would
> > 
> > typedef struct {
> > 	unsigned char data[3];
> > } __be24;
> 
> __packed

I don't think __packed would help here, as alignment(struct) ==
max(alignment(struct member)) == alignment(char).

Don't you want the __packed on the structure that embeds the __be24?

Gr{oetje,eeting}s,

						Geert

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

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							    -- Linus Torvalds