tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers head: 4c707c1c0de83967079b4e385012fa5b00e2cd11 commit: 4e8d31a2893e3ef566a2e9860e746519711a0ed3 [1684/2384] headers/deps: tracing: Optimize <linux/ring_buffer.h>'s header dependencies, remove <linux/poll.h> config: mips-maltaaprp_defconfig (https://download.01.org/0day-ci/archive/20220115/202201152345.4hznmFMe-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 650fc40b6d8d9a5869b4fca525d5f237b0ee2803) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=... git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git git fetch --no-tags mingo-tip sched/headers git checkout 4e8d31a2893e3ef566a2e9860e746519711a0ed3 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/mips/kernel/rtlx.c:14: In file included from include/linux/fs_api.h:2: In file included from include/linux/fs.h:6: include/linux/wait_bit.h:35:19: error: expected ';' after top level declarator extern void __init wait_bit_init(void); ^ ; static __poll_t file_poll(struct file *file, poll_table *wait) ^ poll_wait(file, &channel_wqs[minor].rt_queue, wait); ^ mask |= EPOLLIN | EPOLLRDNORM; ^ mask |= EPOLLIN | EPOLLRDNORM; ^ mask |= EPOLLOUT | EPOLLWRNORM; ^ mask |= EPOLLOUT | EPOLLWRNORM; ^ 7 errors generated. vim +/poll_table +345 arch/mips/kernel/rtlx.c 2600990e640e3b Ralf Baechle 2006-04-05 344 8b9aab09aaf390 Al Viro 2017-07-02 @345 static __poll_t file_poll(struct file *file, poll_table *wait) 2600990e640e3b Ralf Baechle 2006-04-05 346 { 496ad9aa8ef448 Al Viro 2013-01-23 347 int minor = iminor(file_inode(file)); 8b9aab09aaf390 Al Viro 2017-07-02 348 __poll_t mask = 0; 2600990e640e3b Ralf Baechle 2006-04-05 349 2600990e640e3b Ralf Baechle 2006-04-05 @350 poll_wait(file, &channel_wqs[minor].rt_queue, wait); 2600990e640e3b Ralf Baechle 2006-04-05 351 poll_wait(file, &channel_wqs[minor].lx_queue, wait); 2600990e640e3b Ralf Baechle 2006-04-05 352 2600990e640e3b Ralf Baechle 2006-04-05 353 if (rtlx == NULL) 2600990e640e3b Ralf Baechle 2006-04-05 354 return 0; 2600990e640e3b Ralf Baechle 2006-04-05 355 2600990e640e3b Ralf Baechle 2006-04-05 356 /* data available to read? */ 2600990e640e3b Ralf Baechle 2006-04-05 357 if (rtlx_read_poll(minor, 0)) a9a08845e9acbd Linus Torvalds 2018-02-11 @358 mask |= EPOLLIN | EPOLLRDNORM; 2600990e640e3b Ralf Baechle 2006-04-05 359 2600990e640e3b Ralf Baechle 2006-04-05 360 /* space to write */ 2600990e640e3b Ralf Baechle 2006-04-05 361 if (rtlx_write_poll(minor)) a9a08845e9acbd Linus Torvalds 2018-02-11 @362 mask |= EPOLLOUT | EPOLLWRNORM; 2600990e640e3b Ralf Baechle 2006-04-05 363 2600990e640e3b Ralf Baechle 2006-04-05 364 return mask; 2600990e640e3b Ralf Baechle 2006-04-05 365 } 2600990e640e3b Ralf Baechle 2006-04-05 366 :::::: The code at line 345 was first introduced by commit :::::: 8b9aab09aaf390b868359b9365b667cf6506473c mips: annotate ->poll() instances :::::: TO: Al Viro <viro(a)zeniv.linux.org.uk&gt; :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org