linux-kernel - drivers/i3c/master/mipi-i3c-hci/core.c:780:21: warning: attribute declaration must precede definition

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Message-ID: <202012270553.exjchmGL-lkp@intel.com>
Date:   Sun, 27 Dec 2020 05:31:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nicolas Pitre <npitre@...libre.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Boris Brezillon <bbrezillon@...nel.org>
Subject: drivers/i3c/master/mipi-i3c-hci/core.c:780:21: warning: attribute
 declaration must precede definition

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f838f8d2b694cf9d524dc4423e9dd2db13892f3f
commit: 95393f3e07ab53855b91881692a4a5b52dcdc03c i3c/master/mipi-i3c-hci: quiet maybe-unused variable warning
date:   10 days ago
config: x86_64-randconfig-r025-20201221 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=95393f3e07ab53855b91881692a4a5b52dcdc03c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 95393f3e07ab53855b91881692a4a5b52dcdc03c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> drivers/i3c/master/mipi-i3c-hci/core.c:780:21: warning: attribute declaration must precede definition [-Wignored-attributes]
   static const struct __maybe_unused of_device_id i3c_hci_of_match[] = {
                       ^
   include/linux/compiler_attributes.h:267:56: note: expanded from macro '__maybe_unused'
   #define __maybe_unused                  __attribute__((__unused__))
                                                          ^
   include/linux/mod_devicetable.h:262:8: note: previous definition is here
   struct of_device_id {
          ^
   drivers/i3c/master/mipi-i3c-hci/core.c:780:49: warning: unused variable 'i3c_hci_of_match' [-Wunused-const-variable]
   static const struct __maybe_unused of_device_id i3c_hci_of_match[] = {
                                                   ^
   2 warnings generated.


vim +780 drivers/i3c/master/mipi-i3c-hci/core.c

   779	
 > 780	static const struct __maybe_unused of_device_id i3c_hci_of_match[] = {
   781		{ .compatible = "mipi-i3c-hci", },
   782		{},
   783	};
   784	MODULE_DEVICE_TABLE(of, i3c_hci_of_match);
   785	

---
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" (31406 bytes)