linux-kernel - [akpm-mm:mm-unstable 321/323] include/linux/pgtable.h:1713:10: error: redefinition of 'vm_get_page

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Date:   Sun, 3 Jul 2022 02:16:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: [akpm-mm:mm-unstable 321/323] include/linux/pgtable.h:1713:10:
 error: redefinition of 'vm_get_page_prot'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   706370e5c2ea7bb4544eee6e1172c4d68117a526
commit: 5b0de55b24615b5f5f600e2a61c297a0432a5e82 [321/323] sh/mm: enable ARCH_HAS_VM_GET_PAGE_PROT
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20220703/202207030224.tqi3q1Wh-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=5b0de55b24615b5f5f600e2a61c297a0432a5e82
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-unstable
        git checkout 5b0de55b24615b5f5f600e2a61c297a0432a5e82
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from arch/sh/include/asm/io.h:21,
                    from include/linux/io.h:13,
                    from arch/sh/mm/mmap.c:10:
>> include/linux/pgtable.h:1713:10: error: redefinition of 'vm_get_page_prot'
    1713 | pgprot_t vm_get_page_prot(unsigned long vm_flags)                       \
         |          ^~~~~~~~~~~~~~~~
   arch/sh/mm/mmap.c:184:1: note: in expansion of macro 'DECLARE_VM_GET_PAGE_PROT'
     184 | DECLARE_VM_GET_PAGE_PROT
         | ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from arch/sh/mm/mmap.c:11:
   include/linux/mm.h:2864:24: note: previous definition of 'vm_get_page_prot' with type 'pgprot_t(long unsigned int)'
    2864 | static inline pgprot_t vm_get_page_prot(unsigned long vm_flags)
         |                        ^~~~~~~~~~~~~~~~


vim +/vm_get_page_prot +1713 include/linux/pgtable.h

c0f8aa4fa815da Daniel Axtens     2021-06-28  1691  
d3af9262355115 Anshuman Khandual 2022-06-30  1692  /* description of effects of mapping type and prot in current implementation.
d3af9262355115 Anshuman Khandual 2022-06-30  1693   * this is due to the limited x86 page protection hardware.  The expected
d3af9262355115 Anshuman Khandual 2022-06-30  1694   * behavior is in parens:
d3af9262355115 Anshuman Khandual 2022-06-30  1695   *
d3af9262355115 Anshuman Khandual 2022-06-30  1696   * map_type	prot
d3af9262355115 Anshuman Khandual 2022-06-30  1697   *		PROT_NONE	PROT_READ	PROT_WRITE	PROT_EXEC
d3af9262355115 Anshuman Khandual 2022-06-30  1698   * MAP_SHARED	r: (no) no	r: (yes) yes	r: (no) yes	r: (no) yes
d3af9262355115 Anshuman Khandual 2022-06-30  1699   *		w: (no) no	w: (no) no	w: (yes) yes	w: (no) no
d3af9262355115 Anshuman Khandual 2022-06-30  1700   *		x: (no) no	x: (no) yes	x: (no) yes	x: (yes) yes
d3af9262355115 Anshuman Khandual 2022-06-30  1701   *
d3af9262355115 Anshuman Khandual 2022-06-30  1702   * MAP_PRIVATE	r: (no) no	r: (yes) yes	r: (no) yes	r: (no) yes
d3af9262355115 Anshuman Khandual 2022-06-30  1703   *		w: (no) no	w: (no) no	w: (copy) copy	w: (no) no
d3af9262355115 Anshuman Khandual 2022-06-30  1704   *		x: (no) no	x: (no) yes	x: (no) yes	x: (yes) yes
d3af9262355115 Anshuman Khandual 2022-06-30  1705   *
d3af9262355115 Anshuman Khandual 2022-06-30  1706   * On arm64, PROT_EXEC has the following behaviour for both MAP_SHARED and
d3af9262355115 Anshuman Khandual 2022-06-30  1707   * MAP_PRIVATE (with Enhanced PAN supported):
d3af9262355115 Anshuman Khandual 2022-06-30  1708   *								r: (no) no
d3af9262355115 Anshuman Khandual 2022-06-30  1709   *								w: (no) no
d3af9262355115 Anshuman Khandual 2022-06-30  1710   *								x: (yes) yes
d3af9262355115 Anshuman Khandual 2022-06-30  1711   */
d3af9262355115 Anshuman Khandual 2022-06-30  1712  #define DECLARE_VM_GET_PAGE_PROT					\
d3af9262355115 Anshuman Khandual 2022-06-30 @1713  pgprot_t vm_get_page_prot(unsigned long vm_flags)			\
d3af9262355115 Anshuman Khandual 2022-06-30  1714  {									\
d3af9262355115 Anshuman Khandual 2022-06-30  1715  		return protection_map[vm_flags &			\
d3af9262355115 Anshuman Khandual 2022-06-30  1716  			(VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)];	\
d3af9262355115 Anshuman Khandual 2022-06-30  1717  }									\
d3af9262355115 Anshuman Khandual 2022-06-30  1718  EXPORT_SYMBOL(vm_get_page_prot);
d3af9262355115 Anshuman Khandual 2022-06-30  1719  

:::::: The code at line 1713 was first introduced by commit
:::::: d3af92623551153853497bf6434b9b4843ab78e1 mm/mmap: define DECLARE_VM_GET_PAGE_PROT

:::::: TO: Anshuman Khandual <anshuman.khandual@....com>
:::::: CC: akpm <akpm@...ux-foundation.org>

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