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There are some functions only used inside mm. Move them into internal.h. No functional change intended. Link: https://lkml.kernel.org/r/20240612071835.157004-11-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202405251049.hxjwX7zO-lkp@intel.com/ Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: David Hildenbrand <david@redhat.com> Cc: Naoya Horiguchi <nao.horiguchi@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>