[iwlwifi-chromeos:chromeos-kernelupstream-5.14-rc6__master 1/1] include/asm-generic/bug.h:121:6: warning: statement will never be executed

[iwlwifi-chromeos:chromeos-kernelupstream-5.14-rc6__master 1/1] include/asm-generic/bug.h:121:6: warning: statement will never be executed

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git chromeos-kernelupstream-5.14-rc6__master
head:   559fc6b20030249e9152cf36ab505d8d6a828ff2
commit: 559fc6b20030249e9152cf36ab505d8d6a828ff2 [1/1] CHROMIUMOS: iwl7000: add driver
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git/commit/?id=559fc6b20030249e9152cf36ab505d8d6a828ff2
        git remote add iwlwifi-chromeos https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git
        git fetch --no-tags iwlwifi-chromeos chromeos-kernelupstream-5.14-rc6__master
        git checkout 559fc6b20030249e9152cf36ab505d8d6a828ff2
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

   drivers/net/wireless/iwl7000/iwlwifi/iwl-dnt-cfg.c: In function 'iwl_dnt_configure':
>> drivers/net/wireless/iwl7000/iwlwifi/iwl-dnt-cfg.c:307:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
     307 |   if (!dnt->mon_buf_cpu_addr) {
         |      ^
   drivers/net/wireless/iwl7000/iwlwifi/iwl-dnt-cfg.c:312:2: note: here
     312 |  case NO_MONITOR:
         |  ^~~~
   drivers/net/wireless/iwl7000/iwlwifi/iwl-dnt-cfg.c: At top level:
   cc1: warning: unrecognized command line option '-Wno-enum-conversion'
--
>> drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:521: warning: expecting prototype for iwl_tm_gnl_create_message(). Prototype was for iwl_tm_gnl_create_msg() instead
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:577: warning: Function parameter or member 'data_len' not described in 'iwl_tm_gnl_send_msg'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:577: warning: Function parameter or member 'flags' not described in 'iwl_tm_gnl_send_msg'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:769: warning: Function parameter or member 'dev' not described in 'iwl_tm_trace_dump'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:769: warning: Excess function parameter 'tst' description in 'iwl_tm_trace_dump'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:866: warning: Function parameter or member 'skb' not described in 'iwl_tm_gnl_cmd_do'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:866: warning: Function parameter or member 'info' not described in 'iwl_tm_gnl_cmd_do'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:898: warning: Function parameter or member 'skb' not described in 'iwl_tm_gnl_dump'
   drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:898: warning: Function parameter or member 'cb' not described in 'iwl_tm_gnl_dump'
>> drivers/net/wireless/iwl7000/iwlwifi/iwl-tm-gnl.c:1188: warning: expecting prototype for iwl_tm_fw_send_rx(). Prototype was for iwl_tm_gnl_send_rx() instead
--
   In file included from arch/x86/include/asm/bug.h:84,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/percpu.h:5,
                    from include/linux/radix-tree.h:14,
                    from include/linux/idr.h:15,
                    from drivers/net/wireless/iwl7000/hdrs/iwl-chrome.h:13,
                    from <command-line>:
   drivers/net/wireless/iwl7000/mac80211/util.c: In function 'ieee80211_ie_build_he_oper':
>> include/asm-generic/bug.h:121:6: warning: statement will never be executed [-Wswitch-unreachable]
     121 |  int __ret_warn_on = !!(condition);    \
         |      ^~~~~~~~~~~~~
   drivers/net/wireless/iwl7000/mac80211/util.c:3293:3: note: in expansion of macro 'WARN_ON'
    3293 |   WARN_ON(1);
         |   ^~~~~~~
   drivers/net/wireless/iwl7000/mac80211/util.c: At top level:
   cc1: warning: unrecognized command line option '-Wno-enum-conversion'
--
>> drivers/net/wireless/iwl7000/iwlwifi/mvm/rfi.c:11: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * DDR needs frequency in units of 16.666MHz, so provide FW with the


vim +121 include/asm-generic/bug.h

2553b67a1fbe7b Josh Poimboeuf 2016-03-17  115  
2553b67a1fbe7b Josh Poimboeuf 2016-03-17  116  void __warn(const char *file, int line, void *caller, unsigned taint,
2553b67a1fbe7b Josh Poimboeuf 2016-03-17  117  	    struct pt_regs *regs, struct warn_args *args);
2553b67a1fbe7b Josh Poimboeuf 2016-03-17  118  
3a6a62f96f168d Olof Johansson 2008-01-30  119  #ifndef WARN_ON
3a6a62f96f168d Olof Johansson 2008-01-30  120  #define WARN_ON(condition) ({						\
3a6a62f96f168d Olof Johansson 2008-01-30 @121  	int __ret_warn_on = !!(condition);				\
3a6a62f96f168d Olof Johansson 2008-01-30  122  	if (unlikely(__ret_warn_on))					\
3a6a62f96f168d Olof Johansson 2008-01-30  123  		__WARN();						\
684f978347deb4 Herbert Xu     2006-09-29  124  	unlikely(__ret_warn_on);					\
684f978347deb4 Herbert Xu     2006-09-29  125  })
^1da177e4c3f41 Linus Torvalds 2005-04-16  126  #endif
^1da177e4c3f41 Linus Torvalds 2005-04-16  127  

:::::: The code at line 121 was first introduced by commit
:::::: 3a6a62f96f168d192fb0cc9c0b5ee2584740b32d debug: introduce __WARN()

:::::: TO: Olof Johansson <olof@lixom.net>
:::::: CC: Ingo Molnar <mingo@elte.hu>

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

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