[U-Boot] [PATCH 1/2] ext4: Rename block group descriptor table from gd to bgd

[Simon Glass]

Hi Graeme,

On Wed, Oct 3, 2012 at 1:47 PM, Graeme Russ <graeme.russ at gmail.com> wrote:
> Hi Simon,
>
> On Oct 4, 2012 6:40 AM, "Simon Glass" <sjg at chromium.org> wrote:
>>
>> Hi Tom,
>>
>> On Wed, Oct 3, 2012 at 1:04 PM, Tom Rini <trini at ti.com> wrote:
>> > -----BEGIN PGP SIGNED MESSAGE-----
>> > Hash: SHA1
>> >
>> > On 10/03/12 12:53, Simon Glass wrote:
>> >
>> >> On x86 machines gd is unfortunately a #define, so we should avoid
>> >> using gd for anything. This patch changes uses of gd to bgd so that
>> >> ext4fs can be used on x86.
>> >>
>> >> Signed-off-by: Simon Glass <sjg at chromium.org>
>> >
>> > Is there any way to change x86 to not be using a #define for gd?
>>
>> I wasn't brave enough to look hard at that, although Graeme is on copy
>> and will know. It is actually using inline assembly to access this
>> special variable.
>
> Isn't 'gd' used by everyone (global data)? I fail to see how this ever
> worked.

Well only x86 uses a #define for it, so other archs cause no problem.
It means that we can't use 'gd' as a symbol anywhere in U-Boot. I
suppose the only sensible use is a structure member, as here.

Regards,
Simon

>
> Regards,
>
> Graeme