tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   dcaa9a3e88c4082096bfed62d9de2d9b6ad9e3d6
commit: 878b6f5bcef8de64a5c39b685e785166357bf0dc [9078/9582] mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-fix-3
config: arm64-allmodconfig (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 878b6f5bcef8de64a5c39b685e785166357bf0dc
  # save the attached .config to linux build tree
  make.cross ARCH=arm64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/mm.h:54:0,
                    from arch/arm64/kernel/asm-offsets.c:22:
>> arch/arm64/include/asm/pgtable.h:238:0: warning: "HUGE_MAX_HSTATE" redefined
    #define HUGE_MAX_HSTATE  2
    ^
   In file included from include/linux/sched.h:27:0,
                    from arch/arm64/kernel/asm-offsets.c:21:
   include/linux/mm_types.h:372:0: note: this is the location of the previous definition
    #define HUGE_MAX_HSTATE 1
    ^
--
   In file included from include/linux/mm.h:54:0,
                    from arch/arm64/kernel/asm-offsets.c:22:
>> arch/arm64/include/asm/pgtable.h:238:0: warning: "HUGE_MAX_HSTATE" redefined
    #define HUGE_MAX_HSTATE  2
    ^
   In file included from include/linux/sched.h:27:0,
                    from arch/arm64/kernel/asm-offsets.c:21:
   include/linux/mm_types.h:372:0: note: this is the location of the previous definition
    #define HUGE_MAX_HSTATE 1
    ^
   <stdin>:1253:2: warning: #warning syscall userfaultfd not implemented [-Wcpp]

vim +/HUGE_MAX_HSTATE +238 arch/arm64/include/asm/pgtable.h

c2c93e5b Steve Capper    2014-01-15  222  		else
c2c93e5b Steve Capper    2014-01-15  223  			pte_val(pte) |= PTE_RDONLY;
02522463 Will Deacon     2013-01-09  224  	}
02522463 Will Deacon     2013-01-09  225  
4f04d8f0 Catalin Marinas 2012-03-05  226  	set_pte(ptep, pte);
4f04d8f0 Catalin Marinas 2012-03-05  227  }
4f04d8f0 Catalin Marinas 2012-03-05  228  
4f04d8f0 Catalin Marinas 2012-03-05  229  /*
4f04d8f0 Catalin Marinas 2012-03-05  230   * Huge pte definitions.
4f04d8f0 Catalin Marinas 2012-03-05  231   */
084bd298 Steve Capper    2013-04-10  232  #define pte_huge(pte)		(!(pte_val(pte) & PTE_TABLE_BIT))
084bd298 Steve Capper    2013-04-10  233  #define pte_mkhuge(pte)		(__pte(pte_val(pte) & ~PTE_TABLE_BIT))
084bd298 Steve Capper    2013-04-10  234  
084bd298 Steve Capper    2013-04-10  235  /*
084bd298 Steve Capper    2013-04-10  236   * Hugetlb definitions.
084bd298 Steve Capper    2013-04-10  237   */
084bd298 Steve Capper    2013-04-10 @238  #define HUGE_MAX_HSTATE		2
084bd298 Steve Capper    2013-04-10  239  #define HPAGE_SHIFT		PMD_SHIFT
084bd298 Steve Capper    2013-04-10  240  #define HPAGE_SIZE		(_AC(1, UL) << HPAGE_SHIFT)
084bd298 Steve Capper    2013-04-10  241  #define HPAGE_MASK		(~(HPAGE_SIZE - 1))
084bd298 Steve Capper    2013-04-10  242  #define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
4f04d8f0 Catalin Marinas 2012-03-05  243  
4f04d8f0 Catalin Marinas 2012-03-05  244  #define __HAVE_ARCH_PTE_SPECIAL
4f04d8f0 Catalin Marinas 2012-03-05  245  
29e56940 Steve Capper    2014-10-09  246  static inline pte_t pud_pte(pud_t pud)

:::::: The code at line 238 was first introduced by commit
:::::: 084bd29810a5689e423d2f085255a3200a03a06e ARM64: mm: HugeTLB support.

:::::: TO: Steve Capper <steve.capper@linaro.org>
:::::: CC: Steve Capper <steve.capper@linaro.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation