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Message-ID: <202112212008.VXy63TTH-lkp@intel.com>
Date: Tue, 21 Dec 2021 20:18:07 +0800
From: kernel test robot <lkp@...el.com>
To: David Hildenbrand <david@...hat.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org
Subject: [davidhildenbrand:unshare_new 1/4] mm/page_alloc.c:1329:4: error:
implicit declaration of function '__ClearPageAnonExlusive'
tree: git://github.com/davidhildenbrand/linux unshare_new
head: 0b0d58f51fe2675e4dcfb11263ad4cbec053711f
commit: 139b194e6278612218eae13497d76b2605489317 [1/4] mm/page-flags: Introduce PG_anon_exlusive which overloads PG_swap for !PageAnon()
config: hexagon-randconfig-r045-20211220 (https://download.01.org/0day-ci/archive/20211221/202112212008.VXy63TTH-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 555eacf75f21cd1dfc6363d73ad187b730349543)
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/davidhildenbrand/linux/commit/139b194e6278612218eae13497d76b2605489317
git remote add davidhildenbrand git://github.com/davidhildenbrand/linux
git fetch --no-tags davidhildenbrand unshare_new
git checkout 139b194e6278612218eae13497d76b2605489317
# 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=hexagon SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> mm/page_alloc.c:1329:4: error: implicit declaration of function '__ClearPageAnonExlusive' [-Werror,-Wimplicit-function-declaration]
__ClearPageAnonExlusive(page);
^
mm/page_alloc.c:1329:4: note: did you mean '__ClearPageAnonExclusive'?
include/linux/page-flags.h:964:29: note: '__ClearPageAnonExclusive' declared here
static __always_inline void __ClearPageAnonExclusive(struct page *page)
^
mm/page_alloc.c:3807:15: warning: no previous prototype for function 'should_fail_alloc_page' [-Wmissing-prototypes]
noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
^
mm/page_alloc.c:3807:10: note: declare 'static' if the function is not intended to be used outside of this translation unit
noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
^
static
1 warning and 1 error generated.
vim +/__ClearPageAnonExlusive +1329 mm/page_alloc.c
1281
1282 static __always_inline bool free_pages_prepare(struct page *page,
1283 unsigned int order, bool check_free, fpi_t fpi_flags)
1284 {
1285 int bad = 0;
1286 bool skip_kasan_poison = should_skip_kasan_poison(page, fpi_flags);
1287
1288 VM_BUG_ON_PAGE(PageTail(page), page);
1289
1290 trace_mm_page_free(page, order);
1291
1292 if (unlikely(PageHWPoison(page)) && !order) {
1293 /*
1294 * Do not let hwpoison pages hit pcplists/buddy
1295 * Untie memcg state and reset page's owner
1296 */
1297 if (memcg_kmem_enabled() && PageMemcgKmem(page))
1298 __memcg_kmem_uncharge_page(page, order);
1299 reset_page_owner(page, order);
1300 return false;
1301 }
1302
1303 /*
1304 * Check tail pages before head page information is cleared to
1305 * avoid checking PageCompound for order-0 pages.
1306 */
1307 if (unlikely(order)) {
1308 bool compound = PageCompound(page);
1309 int i;
1310
1311 VM_BUG_ON_PAGE(compound && compound_order(page) != order, page);
1312
1313 if (compound) {
1314 ClearPageDoubleMap(page);
1315 ClearPageHasHWPoisoned(page);
1316 }
1317 for (i = 1; i < (1 << order); i++) {
1318 if (compound)
1319 bad += free_tail_pages_check(page, page + i);
1320 if (unlikely(check_free_page(page + i))) {
1321 bad++;
1322 continue;
1323 }
1324 (page + i)->flags &= ~PAGE_FLAGS_CHECK_AT_PREP;
1325 }
1326 }
1327 if (PageMappingFlags(page)) {
1328 if (__PageAnon(page))
> 1329 __ClearPageAnonExlusive(page);
1330 page->mapping = NULL;
1331 }
1332 if (memcg_kmem_enabled() && PageMemcgKmem(page))
1333 __memcg_kmem_uncharge_page(page, order);
1334 if (check_free)
1335 bad += check_free_page(page);
1336 if (bad)
1337 return false;
1338
1339 page_cpupid_reset_last(page);
1340 page->flags &= ~PAGE_FLAGS_CHECK_AT_PREP;
1341 reset_page_owner(page, order);
1342
1343 if (!PageHighMem(page)) {
1344 debug_check_no_locks_freed(page_address(page),
1345 PAGE_SIZE << order);
1346 debug_check_no_obj_freed(page_address(page),
1347 PAGE_SIZE << order);
1348 }
1349
1350 kernel_poison_pages(page, 1 << order);
1351
1352 /*
1353 * As memory initialization might be integrated into KASAN,
1354 * kasan_free_pages and kernel_init_free_pages must be
1355 * kept together to avoid discrepancies in behavior.
1356 *
1357 * With hardware tag-based KASAN, memory tags must be set before the
1358 * page becomes unavailable via debug_pagealloc or arch_free_page.
1359 */
1360 if (kasan_has_integrated_init()) {
1361 if (!skip_kasan_poison)
1362 kasan_free_pages(page, order);
1363 } else {
1364 bool init = want_init_on_free();
1365
1366 if (init)
1367 kernel_init_free_pages(page, 1 << order, false);
1368 if (!skip_kasan_poison)
1369 kasan_poison_pages(page, order, init);
1370 }
1371
1372 /*
1373 * arch_free_page() can make the page's contents inaccessible. s390
1374 * does this. So nothing which can access the page's contents should
1375 * happen after this.
1376 */
1377 arch_free_page(page, order);
1378
1379 debug_pagealloc_unmap_pages(page, 1 << order);
1380
1381 return true;
1382 }
1383
---
0-DAY CI Kernel Test Service, Intel Corporation
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