linux-kernel - arch/mips/kernel/setup.c:47:39: error: redefinition of '__appended_dtb' with a different type: 'const char vs 'char

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Message-ID: <202103231550.WrpT6Gs1-lkp@intel.com>
Date:   Tue, 23 Mar 2021 15:50:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: arch/mips/kernel/setup.c:47:39: error: redefinition of
 '__appended_dtb' with a different type: 'const char vs 'char

Hi Thomas,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   84196390620ac0e5070ae36af84c137c6216a7dc
commit: b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20 MIPS: of: Introduce helper function to get DTB
date:   7 weeks ago
config: mips-randconfig-r022-20210322 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 14696baaf4c43fe53f738bc292bbe169eed93d5d)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

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

All errors (new ones prefixed by >>):

>> arch/mips/kernel/setup.c:47:39: error: redefinition of '__appended_dtb' with a different type: 'const char [1048576]' vs 'char []'
   const char __section(".appended_dtb") __appended_dtb[0x100000];
                                         ^
   arch/mips/include/asm/bootinfo.h:118:13: note: previous declaration is here
   extern char __appended_dtb[];
               ^
   1 error generated.


vim +47 arch/mips/kernel/setup.c

^1da177e4c3f41 Linus Torvalds 2005-04-16  45  
87db537da4cd1b Aaro Koskinen  2015-09-11  46  #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
33def8498fdde1 Joe Perches    2020-10-21 @47  const char __section(".appended_dtb") __appended_dtb[0x100000];
87db537da4cd1b Aaro Koskinen  2015-09-11  48  #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
87db537da4cd1b Aaro Koskinen  2015-09-11  49  

:::::: The code at line 47 was first introduced by commit
:::::: 33def8498fdde180023444b08e12b72a9efed41d treewide: Convert macro and uses of __section(foo) to __section("foo")

:::::: TO: Joe Perches <joe@...ches.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (37024 bytes)