linux-kernel - arch/arm/boot/compressed/decompress.c:50: warning: "memmove" redefined

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Date:   Sun, 9 May 2021 11:32:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>,
        Ard Biesheuvel <ardb@...nel.org>,
        Abbott Liu <liuwenliang@...wei.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: arch/arm/boot/compressed/decompress.c:50: warning: "memmove"
 redefined

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b741596468b010af2846b75f5e75a842ce344a6e
commit: 421015713b306e47af95d4d61cdfbd96d462e4cb ARM: 9017/2: Enable KASan for ARM
date:   6 months ago
config: arm-randconfig-r015-20210509 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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/torvalds/linux.git/commit/?id=421015713b306e47af95d4d61cdfbd96d462e4cb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm 

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

All warnings (new ones prefixed by >>):

>> arch/arm/boot/compressed/decompress.c:50: warning: "memmove" redefined
      50 | #define memmove memmove
         | 
   In file included from arch/arm/boot/compressed/decompress.c:8:
   arch/arm/include/asm/string.h:59: note: this is the location of the previous definition
      59 | #define memmove(dst, src, len) __memmove(dst, src, len)
         | 
   arch/arm/boot/compressed/decompress.c:51: warning: "memcpy" redefined
      51 | #define memcpy memcpy
         | 
   In file included from arch/arm/boot/compressed/decompress.c:8:
   arch/arm/include/asm/string.h:58: note: this is the location of the previous definition
      58 | #define memcpy(dst, src, len) __memcpy(dst, src, len)
         | 
   arch/arm/boot/compressed/decompress.c:59:5: warning: no previous prototype for 'do_decompress' [-Wmissing-prototypes]
      59 | int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
         |     ^~~~~~~~~~~~~


vim +/memmove +50 arch/arm/boot/compressed/decompress.c

6e8699f7d68589 Albin Tonnerre 2010-04-03  48  
a7f464f3db93ae Imre Kaloz     2012-01-26  49  #ifdef CONFIG_KERNEL_XZ
a7f464f3db93ae Imre Kaloz     2012-01-26 @50  #define memmove memmove
a7f464f3db93ae Imre Kaloz     2012-01-26  51  #define memcpy memcpy
a7f464f3db93ae Imre Kaloz     2012-01-26  52  #include "../../../../lib/decompress_unxz.c"
a7f464f3db93ae Imre Kaloz     2012-01-26  53  #endif
a7f464f3db93ae Imre Kaloz     2012-01-26  54  

:::::: The code at line 50 was first introduced by commit
:::::: a7f464f3db93ae5492bee6f6e48939fd8a45fa99 ARM: 7001/2: Wire up support for the XZ decompressor

:::::: TO: Imre Kaloz <kaloz@...nwrt.org>
:::::: CC: Russell King <rmk+kernel@....linux.org.uk>

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

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