tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: 312017a460d5ea31d646e7148e400e13db799ddc commit: f712e3066f75996f49b60145f0329f9e078eeabd [8055/9999] mm/page_owner: don't access uninitialized memmaps when reading /proc/pagetypeinfo config: ia64-randconfig-a001-20191213 (attached as .config) compiler: ia64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout f712e3066f75996f49b60145f0329f9e078eeabd # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from arch/ia64/include/asm/ptrace.h:46:0, from arch/ia64/include/asm/processor.h:20, from arch/ia64/include/asm/thread_info.h:12, from include/linux/thread_info.h:38, from include/asm-generic/preempt.h:5, from ./arch/ia64/include/generated/asm/preempt.h:1, from include/linux/preempt.h:81, from include/linux/spinlock.h:51, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/debugfs.h:15, from mm/page_owner.c:2: mm/internal.h: In function 'mem_map_next': arch/ia64/include/asm/page.h:118:36: error: 'max_mapnr' undeclared (first use in this function); did you mean 'dax_mapping'? # define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn)) ^ mm/internal.h:385:8: note: in expansion of macro 'pfn_valid' if (!pfn_valid(pfn)) ^~~~~~~~~ arch/ia64/include/asm/page.h:118:36: note: each undeclared identifier is reported only once for each function it appears in # define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn)) ^ mm/internal.h:385:8: note: in expansion of macro 'pfn_valid' if (!pfn_valid(pfn)) ^~~~~~~~~ mm/page_owner.c: In function 'pagetypeinfo_showmixedcount_print': arch/ia64/include/asm/page.h:118:36: error: 'max_mapnr' undeclared (first use in this function); did you mean 'dax_mapping'? # define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn)) ^ include/linux/memory_hotplug.h:225:6: note: in expansion of macro 'pfn_valid' if (pfn_valid(pfn)) \ ^~~~~~~~~ >> mm/page_owner.c:276:10: note: in expansion of macro 'pfn_to_online_page' page = pfn_to_online_page(pfn); ^~~~~~~~~~~~~~~~~~ mm/page_owner.c: In function 'read_page_owner': arch/ia64/include/asm/page.h:118:36: error: 'max_mapnr' undeclared (first use in this function); did you mean 'dax_mapping'? # define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn)) ^ mm/page_owner.c:470:10: note: in expansion of macro 'pfn_valid' while (!pfn_valid(pfn) && (pfn & (MAX_ORDER_NR_PAGES - 1)) != 0) ^~~~~~~~~ mm/page_owner.c: In function 'init_pages_in_zone': arch/ia64/include/asm/page.h:118:36: error: 'max_mapnr' undeclared (first use in this function); did you mean 'dax_mapping'? # define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn)) ^ mm/page_owner.c:544:8: note: in expansion of macro 'pfn_valid' if (!pfn_valid(pfn)) { ^~~~~~~~~ vim +/pfn_to_online_page +276 mm/page_owner.c 254 255 void pagetypeinfo_showmixedcount_print(struct seq_file *m, 256 pg_data_t *pgdat, struct zone *zone) 257 { 258 struct page *page; 259 struct page_ext *page_ext; 260 struct page_owner *page_owner; 261 unsigned long pfn = zone->zone_start_pfn, block_end_pfn; 262 unsigned long end_pfn = pfn + zone->spanned_pages; 263 unsigned long count[MIGRATE_TYPES] = { 0, }; 264 int pageblock_mt, page_mt; 265 int i; 266 267 /* Scan block by block. First and last block may be incomplete */ 268 pfn = zone->zone_start_pfn; 269 270 /* 271 * Walk the zone in pageblock_nr_pages steps. If a page block spans 272 * a zone boundary, it will be double counted between zones. This does 273 * not matter as the mixed block count will still be correct 274 */ 275 for (; pfn < end_pfn; ) { > 276 page = pfn_to_online_page(pfn); 277 if (!page) { 278 pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES); 279 continue; 280 } 281 282 block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); 283 block_end_pfn = min(block_end_pfn, end_pfn); 284 285 pageblock_mt = get_pageblock_migratetype(page); 286 287 for (; pfn < block_end_pfn; pfn++) { 288 if (!pfn_valid_within(pfn)) 289 continue; 290 291 /* The pageblock is online, no need to recheck. */ 292 page = pfn_to_page(pfn); 293 294 if (page_zone(page) != zone) 295 continue; 296 297 if (PageBuddy(page)) { 298 unsigned long freepage_order; 299 300 freepage_order = page_order_unsafe(page); 301 if (freepage_order < MAX_ORDER) 302 pfn += (1UL << freepage_order) - 1; 303 continue; 304 } 305 306 if (PageReserved(page)) 307 continue; 308 309 page_ext = lookup_page_ext(page); 310 if (unlikely(!page_ext)) 311 continue; 312 313 if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags)) 314 continue; 315 316 page_owner = get_page_owner(page_ext); 317 page_mt = gfpflags_to_migratetype( 318 page_owner->gfp_mask); 319 if (pageblock_mt != page_mt) { 320 if (is_migrate_cma(pageblock_mt)) 321 count[MIGRATE_MOVABLE]++; 322 else 323 count[pageblock_mt]++; 324 325 pfn = block_end_pfn; 326 break; 327 } 328 pfn += (1UL << page_owner->order) - 1; 329 } 330 } 331 332 /* Print counts */ 333 seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); 334 for (i = 0; i < MIGRATE_TYPES; i++) 335 seq_printf(m, "%12lu ", count[i]); 336 seq_putc(m, '\n'); 337 } 338 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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