Re: linux kernel building for mips malta target board

[David Daney <ddaney at avtrex dot com>]

sjhill@realitydiluted.com wrote:
> > > I would like to build latest kernel (ie kernel 2.6.13) for mips malta
> > > board. Can any one advise me the cross-compiler tools version to be 
> > > used for building the linux kernel.
> >
> > I use both gcc-3.3.1 and gcc-3.4.3 to build 2.6.x mips linux kernels.  I 
> > think for the 2.6.13 kernel any of the latest released versions of 
> > 3.3.x, 3.4.x, or 4.0.x would work.  Use the latest binutils (2.16.91 
> > 20050817 is what I am using).
>
> Also, make sure to NOT use any of the 4.1 GCC stuff with Linux/MIPS
> kernels. I am still tracking down errors with it.

Is this the problem you are seeing?:
In file included from include/linux/nfs_fs.h:15,
                 from init/do_mounts.c:12:
include/linux/pagemap.h: In function ‘fault_in_pages_readable’:
include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used 
as ‘asm’ output
include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used 
as ‘asm’ output
include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used 
as ‘asm’ output
include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used 
as ‘asm’ output

The compiler behavior has changed since 4.0.1, but I think the new 
behavior is correct.  I am blaming the __get_user macro in 
include/asm-mips/uaccess.h.  It should be possible to fix it there.  The 
alternative is to hack up include/linux/pagemap.h.

David Daney

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