Hi Edward, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Edward-Wu/mm-cma-sync-everything-after-EBUSY/20220615-101716 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything config: xtensa-allyesconfig (https://download.01.org/0day-ci/archive/20220616/202206160330.nZiFjZFG-lkp@xxxxxxxxx/config) compiler: xtensa-linux-gcc (GCC) 11.3.0 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/ef04552ed13eb371365fcc55c7ae1e5c3c211168 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Edward-Wu/mm-cma-sync-everything-after-EBUSY/20220615-101716 git checkout ef04552ed13eb371365fcc55c7ae1e5c3c211168 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=xtensa SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> mm/cma.c:415:6: warning: no previous prototype for 'cma_sync_work' [-Wmissing-prototypes] 415 | void cma_sync_work(struct work_struct *work) | ^~~~~~~~~~~~~ >> mm/cma.c:422:6: warning: no previous prototype for 'cma_ebusy_sync_pinned_pages' [-Wmissing-prototypes] 422 | void cma_ebusy_sync_pinned_pages(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/cma_sync_work +415 mm/cma.c 414 > 415 void cma_sync_work(struct work_struct *work) 416 { 417 ksys_sync(); 418 kfree(work); 419 pr_debug("%s(): EBUSY Sync complete\n", __func__); 420 } 421 > 422 void cma_ebusy_sync_pinned_pages(void) 423 { 424 struct work_struct *work; 425 426 work = kmalloc(sizeof(*work), GFP_ATOMIC); 427 if (work) { 428 INIT_WORK(work, cma_sync_work); 429 schedule_work(work); 430 } 431 } 432 -- 0-DAY CI Kernel Test Service https://01.org/lkp
