tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   8dd2c81f5a94f4b44b7a2f0337caae75ed6a5386
commit: cc85b60a4616768c88e8e8cb889c55d5284a887b [7535/8699] mm/hugetlb: reduce arch dependent code around follow_huge_*
config: powerpc-mpc85xx_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout cc85b60a4616768c88e8e8cb889c55d5284a887b
  # save the attached .config to linux build tree
  make.cross ARCH=powerpc 

All error/warnings:

>> arch/powerpc/mm/hugetlbpage.c:710:1: error: conflicting types for 'follow_huge_pud'
    follow_huge_pud(struct mm_struct *mm, unsigned long address,
    ^
   In file included from arch/powerpc/mm/hugetlbpage.c:14:0:
   include/linux/hugetlb.h:103:14: note: previous declaration of 'follow_huge_pud' was here
    struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
                 ^

vim +/follow_huge_pud +710 arch/powerpc/mm/hugetlbpage.c

   704	{
   705		BUG();
   706		return NULL;
   707	}
   708	
   709	struct page *
 > 710	follow_huge_pud(struct mm_struct *mm, unsigned long address,
   711			pmd_t *pmd, int write)
   712	{
   713		BUG();

---
0-DAY kernel build testing backend              Open Source Technology Center
http://lists.01.org/mailman/listinfo/kbuild                 Intel Corporation