After many hours of compilation I finally have a comedi specific problem:

 CC [M]  drivers/staging/comedi/range.o
  CC [M]  drivers/staging/comedi/drivers.o
drivers/staging/comedi/drivers.c: In function ‘comedi_buf_alloc’:
drivers/staging/comedi/drivers.c:510: error: ‘PAGE_KERNEL_NOCACHE’ undeclared
(first use in this function)
drivers/staging/comedi/drivers.c:510: error: (Each undeclared identifier is
reported only once
drivers/staging/comedi/drivers.c:510: error: for each function it appears in.)
make[4]: *** [drivers/staging/comedi/drivers.o] Error 1
make[3]: *** [drivers/staging/comedi] Error 2
make[2]: *** [drivers/staging] Error 2
make[1]: *** [drivers] Error 2
make[1]: Leaving directory `/root/linux-ti-omap-2.6.33'
make: *** [debian/stamp/build/kernel] Error 2

A quick bit of analysis reveals that the page protection
flag ‘PAGE_KERNEL_NOCACHE’ does not exist for the ARM port of the kernel.  I
don't know what I am doing but I have subsituted PAGE_KERNEL instead, because
looking at the options it appeared to be the most sensible.

I think this has come up before, in the context of the PPC port which had a
different fix. I think it needs a more qualified look at than I can give.
There must be an example somewhere in the kernel on how to allocate a large
DMA buffer in the kernel in a manner that is cross platform.

My quick hack (above) just took me to the next compile error which isn't
comedi related (a gcc bug hopefully side stepped by ditching the sound
drivers).

Cheers,

SA

Thanks,

SA