linux-kernel - [mani-mhi:mhi-next 12/30] drivers/bus/mhi/host/../common.h:278:15: warning: type qualifiers ignored on function return type

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Date:   Tue, 1 Mar 2022 23:34:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Hemant Kumar <hemantk@...eaurora.org>,
        Alex Elder <elder@...aro.org>
Subject: [mani-mhi:mhi-next 12/30] drivers/bus/mhi/host/../common.h:278:15:
 warning: type qualifiers ignored on function return type

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git mhi-next
head:   b85d0d28ed263a5421f698d5c7bd513c7b6d8b97
commit: ed97144182117586712c8036ded0bab36898eae0 [12/30] bus: mhi: Make mhi_state_str[] array static inline and move to common.h
config: arc-randconfig-r043-20220301 (https://download.01.org/0day-ci/archive/20220301/202203012357.0m19fbpl-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 11.2.0
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/mani/mhi.git/commit/?id=ed97144182117586712c8036ded0bab36898eae0
        git remote add mani-mhi https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git
        git fetch --no-tags mani-mhi mhi-next
        git checkout ed97144182117586712c8036ded0bab36898eae0
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/bus/

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 >>):

   In file included from drivers/bus/mhi/host/internal.h:10,
                    from drivers/bus/mhi/host/init.c:21:
>> drivers/bus/mhi/host/../common.h:278:15: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     278 | static inline const char * const mhi_state_str(enum mhi_state state)
         |               ^~~~~


vim +278 drivers/bus/mhi/host/../common.h

   277	
 > 278	static inline const char * const mhi_state_str(enum mhi_state state)
   279	{
   280		switch (state) {
   281		case MHI_STATE_RESET:
   282			return "RESET";
   283		case MHI_STATE_READY:
   284			return "READY";
   285		case MHI_STATE_M0:
   286			return "M0";
   287		case MHI_STATE_M1:
   288			return "M1";
   289		case MHI_STATE_M2:
   290			return "M2";
   291		case MHI_STATE_M3:
   292			return "M3";
   293		case MHI_STATE_M3_FAST:
   294			return "M3 FAST";
   295		case MHI_STATE_BHI:
   296			return "BHI";
   297		case MHI_STATE_SYS_ERR:
   298			return "SYS ERROR";
   299		default:
   300			return "Unknown state";
   301		}
   302	};
   303	

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