Hi Rudi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bb7c241fae6228e89c0286ffd6f249b3b0dea225]

url:    https://github.com/intel-lab-lkp/linux/commits/Rudi-Heitbaum/dt-bindings-net-realtek-bluetooth-Add-RTL8822BS/20230514-155000
base:   bb7c241fae6228e89c0286ffd6f249b3b0dea225
patch link:    https://lore.kernel.org/r/20230514074731.70614-3-rudi%40heitbaum.com
patch subject: [PATCH 2/3] Bluetooth: btrtl: Add support for RTL8822BS UART
config: arm-allyesconfig
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/2f68c37a4fd8f66ba45a8ff74d845954644401e0
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Rudi-Heitbaum/dt-bindings-net-realtek-bluetooth-Add-RTL8822BS/20230514-155000
        git checkout 2f68c37a4fd8f66ba45a8ff74d845954644401e0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/bluetooth/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305141828.USyPW8CP-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/bitops.h:68,
                    from include/linux/log2.h:12,
                    from include/asm-generic/div64.h:55,
                    from arch/arm/include/asm/div64.h:107,
                    from include/linux/math.h:6,
                    from include/linux/math64.h:6,
                    from include/linux/time.h:6,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from drivers/bluetooth/btrtl.c:8:
   drivers/bluetooth/btrtl.c: In function 'btrtl_set_quirks':
>> arch/arm/include/asm/bitops.h:185:41: warning: this statement may fall through [-Wimplicit-fallthrough=]
     185 | #define ATOMIC_BITOP(name,nr,p)         _##name(nr,p)
         |                                         ^~~~~~~~~~~~~
   arch/arm/include/asm/bitops.h:191:41: note: in expansion of macro 'ATOMIC_BITOP'
     191 | #define set_bit(nr,p)                   ATOMIC_BITOP(set_bit,nr,p)
         |                                         ^~~~~~~~~~~~
   drivers/bluetooth/btrtl.c:1194:17: note: in expansion of macro 'set_bit'
    1194 |                 set_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2, &hdev->quirks);
         |                 ^~~~~~~
   drivers/bluetooth/btrtl.c:1195:9: note: here
    1195 |         default:
         |         ^~~~~~~


vim +185 arch/arm/include/asm/bitops.h

^1da177e4c3f41 include/asm-arm/bitops.h      Linus Torvalds 2005-04-16  177  
e7ec02938dbe8c include/asm-arm/bitops.h      Russell King   2005-07-28  178  #ifndef CONFIG_SMP
^1da177e4c3f41 include/asm-arm/bitops.h      Linus Torvalds 2005-04-16  179  /*
^1da177e4c3f41 include/asm-arm/bitops.h      Linus Torvalds 2005-04-16  180   * The __* form of bitops are non-atomic and may be reordered.
^1da177e4c3f41 include/asm-arm/bitops.h      Linus Torvalds 2005-04-16  181   */
6323f0ccedf756 arch/arm/include/asm/bitops.h Russell King   2011-01-16  182  #define ATOMIC_BITOP(name,nr,p)			\
6323f0ccedf756 arch/arm/include/asm/bitops.h Russell King   2011-01-16  183  	(__builtin_constant_p(nr) ? ____atomic_##name(nr, p) : _##name(nr,p))
e7ec02938dbe8c include/asm-arm/bitops.h      Russell King   2005-07-28  184  #else
6323f0ccedf756 arch/arm/include/asm/bitops.h Russell King   2011-01-16 @185  #define ATOMIC_BITOP(name,nr,p)		_##name(nr,p)
e7ec02938dbe8c include/asm-arm/bitops.h      Russell King   2005-07-28  186  #endif
^1da177e4c3f41 include/asm-arm/bitops.h      Linus Torvalds 2005-04-16  187  

-- 
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https://github.com/intel/lkp-tests