HIGHMEM and 2.6.28

["Jon Fraser" <jfraser@broadcom.com>]

Has anybody been able to get HIGHMEM to work on 2.6.28
with an r4k style processor?

We have it working on 2.6.24 on a mips r24k.  We even have it working
with discontiguous memory and cache aliasing.  I ported our changes
to 2.6.28, but no joy.  I switched to a smaller cache to avoid cache
aliasing, and changed to a flat memory model to eliminate the
discontiguous memory code, but still no joy.  

We're using 2.6.28.9

Thanks,
Jon Fraser
Broadcom