64-bit build failure without hugetlbfs

[Johannes Berg]

  LD      vmlinux.o
mm/built-in.o: In function `.arch_get_unmapped_area_topdown':
(.text+0x1d084): multiple definition of `.arch_get_unmapped_area_topdown'
arch/powerpc/mm/built-in.o:(.text+0x7240): first defined here
mm/built-in.o: In function `arch_get_unmapped_area_topdown':
(.opd+0x2730): multiple definition of `arch_get_unmapped_area_topdown'
arch/powerpc/mm/built-in.o:(.opd+0x918): first defined here
mm/built-in.o: In function `.arch_get_unmapped_area':
(.text+0x1ce3c): multiple definition of `.arch_get_unmapped_area'
arch/powerpc/mm/built-in.o:(.text+0x72b8): first defined here
mm/built-in.o: In function `arch_get_unmapped_area':
(.opd+0x2718): multiple definition of `arch_get_unmapped_area'
arch/powerpc/mm/built-in.o:(.opd+0x930): first defined here
make: *** [vmlinux.o] Error 1

enabling hugetlbfs cures it.

johannes
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