[linux-next:master 6243/6567] WARNING: vmlinux.o(.text.unlikely+0x5fb7): Section mismatch in reference from the function __def_free() to the function .init.text:__free_pages_boot_core()

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   a7dd40274d75326ca868479c62090b1198a357ad
commit: 430676b385fb341d5a33950bae284d0df2e70117 [6243/6567] mm: deferred_init_memmap improvements
config: x86_64-randconfig-it0-10181522 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 430676b385fb341d5a33950bae284d0df2e70117
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> WARNING: vmlinux.o(.text.unlikely+0x5fb7): Section mismatch in reference from the function __def_free() to the function .init.text:__free_pages_boot_core()
   The function __def_free() references
   the function __init __free_pages_boot_core().
   This is often because __def_free lacks a __init
   annotation or the annotation of __free_pages_boot_core is wrong.

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