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Date: Tue, 2 Jan 2024 11:31:19 +0800
From: kernel test robot <lkp@intel.com>
To: Arend van Spriel <arend.vanspriel@broadcom.com>,
	Kalle Valo <kvalo@kernel.org>
Cc: oe-kbuild-all@lists.linux.dev, linux-wireless@vger.kernel.org,
	Arend van Spriel <arend.vanspriel@broadcom.com>
Subject: Re: [PATCH 1/4] wifi: brcmfmac: export firmware interface functions
Message-ID: <202401021103.U0Y8xoJK-lkp@intel.com>
References: <20240101084430.161821-2-arend.vanspriel@broadcom.com>
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In-Reply-To: <20240101084430.161821-2-arend.vanspriel@broadcom.com>

Hi Arend,

kernel test robot noticed the following build warnings:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v6.7-rc8 next-20231222]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Arend-van-Spriel/wifi-brcmfmac-export-firmware-interface-functions/20240101-164717
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20240101084430.161821-2-arend.vanspriel%40broadcom.com
patch subject: [PATCH 1/4] wifi: brcmfmac: export firmware interface functions
config: sparc-allmodconfig (https://download.01.org/0day-ci/archive/20240102/202401021103.U0Y8xoJK-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240102/202401021103.U0Y8xoJK-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401021103.U0Y8xoJK-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/swab.h:5,
                    from include/uapi/linux/byteorder/big_endian.h:14,
                    from include/linux/byteorder/big_endian.h:5,
                    from arch/sparc/include/uapi/asm/byteorder.h:5,
                    from arch/sparc/include/asm/bitops_64.h:16,
                    from arch/sparc/include/asm/bitops.h:5,
                    from include/linux/bitops.h:68,
                    from include/linux/kernel.h:23,
                    from drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:8:
   In function '__fswab32',
       inlined from 'brcmf_fil_cmd_int_get' at drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h:99:19,
       inlined from 'brcmf_cfg80211_get_station_ibss' at drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:3088:8:
>> include/uapi/linux/swab.h:19:45: warning: 'rate' is used uninitialized [-Wuninitialized]
      19 |         (((__u32)(x) & (__u32)0x000000ffUL) << 24) |            \
         |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
   include/uapi/linux/swab.h:62:16: note: in expansion of macro '___constant_swab32'
      62 |         return ___constant_swab32(val);
         |                ^~~~~~~~~~~~~~~~~~
   drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c: In function 'brcmf_cfg80211_get_station_ibss':
   drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:3084:13: note: 'rate' was declared here
    3084 |         u32 rate;
         |             ^~~~


vim +/rate +19 include/uapi/linux/swab.h

607ca46e97a1b6 David Howells 2012-10-13   9  
607ca46e97a1b6 David Howells 2012-10-13  10  /*
607ca46e97a1b6 David Howells 2012-10-13  11   * casts are necessary for constants, because we never know how for sure
607ca46e97a1b6 David Howells 2012-10-13  12   * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
607ca46e97a1b6 David Howells 2012-10-13  13   */
607ca46e97a1b6 David Howells 2012-10-13  14  #define ___constant_swab16(x) ((__u16)(				\
607ca46e97a1b6 David Howells 2012-10-13  15  	(((__u16)(x) & (__u16)0x00ffU) << 8) |			\
607ca46e97a1b6 David Howells 2012-10-13  16  	(((__u16)(x) & (__u16)0xff00U) >> 8)))
607ca46e97a1b6 David Howells 2012-10-13  17  
607ca46e97a1b6 David Howells 2012-10-13  18  #define ___constant_swab32(x) ((__u32)(				\
607ca46e97a1b6 David Howells 2012-10-13 @19  	(((__u32)(x) & (__u32)0x000000ffUL) << 24) |		\
607ca46e97a1b6 David Howells 2012-10-13  20  	(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) |		\
607ca46e97a1b6 David Howells 2012-10-13  21  	(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) |		\
607ca46e97a1b6 David Howells 2012-10-13  22  	(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
607ca46e97a1b6 David Howells 2012-10-13  23  

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