linux-next: build failure after merge of the final tree (akpm tree related)

Hi Andrew,

After merging the akpm tree, today's linux-next build (any without
CONFIG_MMU e.g. bfin BF537-STAMP_defconfig) failed like this:

fs/proc/task_nommu.c:173: undefined reference to `vm_is_stack'

Caused by commit "procfs: mark thread stack correctly in proc/<pid>/maps"
from the akpm tree which only defines that function when CONFIG_MMU is
set.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au