[mmotm:master 123/232] WARNING: mm/built-in.o(.text+0x2b91d): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:init_currently_empty_zone()

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   c9e652f1af277422827824aa002e12f35c9f0627
commit: 9692e1fa46418e3faab906e40e03b33024016292 [123/232] mm, memory_hotplug: do not associate hotadded memory to zones until online
config: i386-randconfig-r0-201713 (attached as .config)
compiler: gcc-5 (Debian 5.4.1-2) 5.4.1 20160904
reproduce:
        git checkout 9692e1fa46418e3faab906e40e03b33024016292
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> WARNING: mm/built-in.o(.text+0x2b91d): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:init_currently_empty_zone()
   The function move_pfn_range_to_zone() references
   the function __meminit init_currently_empty_zone().
   This is often because move_pfn_range_to_zone lacks a __meminit
   annotation or the annotation of init_currently_empty_zone is wrong.
--
>> WARNING: mm/built-in.o(.text+0x2b9c5): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:memmap_init_zone()
   The function move_pfn_range_to_zone() references
   the function __meminit memmap_init_zone().
   This is often because move_pfn_range_to_zone lacks a __meminit
   annotation or the annotation of memmap_init_zone is wrong.

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