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To avoid any functional changes to radix paths when building with hash MMU support disabled (and CONFIG_PPC_MM_SLICES=n), always define the arch get_unmapped_area calls on 64s platforms. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-16-npiggin@gmail.com