Hi Minchan, I love your patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on linus/master v5.12-rc2 next-20210309] [cannot apply to hnaz-linux-mm/master] [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] url: https://github.com/0day-ci/linux/commits/Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210309-131826 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32 config: powerpc-skiroot_defconfig (attached as .config) compiler: powerpc64le-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/e746db1a2ab13441890fa2cad8604bbec190b401 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210309-131826 git checkout e746db1a2ab13441890fa2cad8604bbec190b401 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from mm/mempolicy.c:92: include/linux/migrate.h: In function 'migrate_prep': include/linux/migrate.h:70:48: error: 'return' with a value, in function returning void [-Werror=return-type] 70 | static inline void migrate_prep(void) { return -ENOSYS; } | ^ include/linux/migrate.h:70:20: note: declared here 70 | static inline void migrate_prep(void) { return -ENOSYS; } | ^~~~~~~~~~~~ include/linux/migrate.h: In function 'migrate_prep_local': include/linux/migrate.h:71:54: error: 'return' with a value, in function returning void [-Werror=return-type] 71 | static inline void migrate_prep_local(void) { return -ENOSYS; } | ^ include/linux/migrate.h:71:20: note: declared here 71 | static inline void migrate_prep_local(void) { return -ENOSYS; } | ^~~~~~~~~~~~~~~~~~ mm/mempolicy.c: In function 'do_mbind': >> mm/mempolicy.c:1378:3: error: implicit declaration of function 'migrate_finish'; did you mean 'migrate_done'? [-Werror=implicit-function-declaration] 1378 | migrate_finish(); | ^~~~~~~~~~~~~~ | migrate_done cc1: some warnings being treated as errors vim +1378 mm/mempolicy.c 1277 1278 static long do_mbind(unsigned long start, unsigned long len, 1279 unsigned short mode, unsigned short mode_flags, 1280 nodemask_t *nmask, unsigned long flags) 1281 { 1282 struct mm_struct *mm = current->mm; 1283 struct mempolicy *new; 1284 unsigned long end; 1285 int err; 1286 int ret; 1287 LIST_HEAD(pagelist); 1288 1289 if (flags & ~(unsigned long)MPOL_MF_VALID) 1290 return -EINVAL; 1291 if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE)) 1292 return -EPERM; 1293 1294 if (start & ~PAGE_MASK) 1295 return -EINVAL; 1296 1297 if (mode == MPOL_DEFAULT) 1298 flags &= ~MPOL_MF_STRICT; 1299 1300 len = (len + PAGE_SIZE - 1) & PAGE_MASK; 1301 end = start + len; 1302 1303 if (end < start) 1304 return -EINVAL; 1305 if (end == start) 1306 return 0; 1307 1308 new = mpol_new(mode, mode_flags, nmask); 1309 if (IS_ERR(new)) 1310 return PTR_ERR(new); 1311 1312 if (flags & MPOL_MF_LAZY) 1313 new->flags |= MPOL_F_MOF; 1314 1315 /* 1316 * If we are using the default policy then operation 1317 * on discontinuous address spaces is okay after all 1318 */ 1319 if (!new) 1320 flags |= MPOL_MF_DISCONTIG_OK; 1321 1322 pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx\n", 1323 start, start + len, mode, mode_flags, 1324 nmask ? nodes_addr(*nmask)[0] : NUMA_NO_NODE); 1325 1326 if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { 1327 1328 migrate_prep(); 1329 } 1330 { 1331 NODEMASK_SCRATCH(scratch); 1332 if (scratch) { 1333 mmap_write_lock(mm); 1334 err = mpol_set_nodemask(new, nmask, scratch); 1335 if (err) 1336 mmap_write_unlock(mm); 1337 } else 1338 err = -ENOMEM; 1339 NODEMASK_SCRATCH_FREE(scratch); 1340 } 1341 if (err) 1342 goto mpol_out; 1343 1344 ret = queue_pages_range(mm, start, end, nmask, 1345 flags | MPOL_MF_INVERT, &pagelist); 1346 1347 if (ret < 0) { 1348 err = ret; 1349 goto up_out; 1350 } 1351 1352 err = mbind_range(mm, start, end, new); 1353 1354 if (!err) { 1355 int nr_failed = 0; 1356 1357 if (!list_empty(&pagelist)) { 1358 WARN_ON_ONCE(flags & MPOL_MF_LAZY); 1359 nr_failed = migrate_pages(&pagelist, new_page, NULL, 1360 start, MIGRATE_SYNC, MR_MEMPOLICY_MBIND); 1361 if (nr_failed) 1362 putback_movable_pages(&pagelist); 1363 } 1364 1365 if ((ret > 0) || (nr_failed && (flags & MPOL_MF_STRICT))) 1366 err = -EIO; 1367 } else { 1368 up_out: 1369 if (!list_empty(&pagelist)) 1370 putback_movable_pages(&pagelist); 1371 } 1372 1373 mmap_write_unlock(mm); 1374 mpol_out: 1375 mpol_put(new); 1376 1377 if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) > 1378 migrate_finish(); 1379 1380 return err; 1381 } 1382 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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