The c6x arch (no MMU) is failing to build in linux-next with:
kernel/built-in.o:(.fardata+0x3fc): undefined reference to `overcommit_ratio_handler'
kernel/built-in.o:(.fardata+0x420): undefined reference to `overcommit_kbytes_handler'
make[1]: *** [vmlinux] Error 1
Looks like this patch adds those functions to mm/mmap.c which
is only used when CONFIG_MMU is defined.
commit 31bdaf7c8e8a784fd8f889371bdacb24670734c7
Author: Jerome Marchand <jmarchan@xxxxxxxxxx>
Date: Tue Dec 17 10:45:06 2013 +1100
mm: add overcommit_kbytes sysctl variable
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