problem with the latest linux-pmac-stable from linuxcare.com.au

I just rsync'd the linux-pmac-stable tree this morning, and found that
it no longer builds.  There is a undefined reference to
"buffer_lowprio".  Now this function used to be defined in
"include/linux/fs.h"  but it appears to have been cleared out of there
(along with a bunch of other stuff refering to buffer). It appears to
still be used by "drivers/block/ll_rw_blk.c" and md.c and raid*.c.  Is
there any problem adding the functions back into fs.h, or is there a
better way to resolve the undefined references?
        G++

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