Re: [PATCH 2.6.9-rc3-mm2] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR

[Jeff Garzik]

Matt Domsch wrote:
> Some controller BIOSes have problems with the legacy int13 fn02 READ
> SECTORS command.  int13 fn42 EXTENDED READ is used in preference by
> most boot loaders today, so lets use that.  If EXTENDED READ fails or
> isn't supported, fall back to READ SECTORS.
>
> This hopefully resolves the three reports of BIOSes which would either
> long-pause (30+ seconds) or hang completely on the legacy READ SECTORS
> command.
>
> This also adds CONFIG_EDD_SKIP_MBR to eliminate reading the MBR on
> each BIOS-presented disk, in case there are further problems in this
> area.


Build fails on x86-64:

[...]
  SYSMAP  System.map
  SYSMAP  .tmp_System.map
  AS      arch/x86_64/boot/setup.o
In file included from arch/x86_64/boot/setup.S:536:
arch/i386/boot/edd.S:17: macro names must be identifiers
make[1]: *** [arch/x86_64/boot/setup.o] Error 1
make: *** [bzImage] Error 2
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