Messages in this thread | | | Date | Wed, 22 Dec 2021 04:24:42 +0800 | From | kernel test robot <> | Subject | [davidhildenbrand:unshare_new 3/4] mm/huge_memory.c:1381:13: error: too few arguments to function 'gup_must_unshare' |
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tree: git://github.com/davidhildenbrand/linux unshare_new head: 0b0d58f51fe2675e4dcfb11263ad4cbec053711f commit: d3eb6d68346c3d9e89ae68461e0eabb5bc7def17 [3/4] mm: gup: trigger unsharing via FAULT_FLAG_UNSHARE when required (!hugetlb) config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20211222/202112220427.4D3zNiRN-lkp@intel.com/config) compiler: sparc64-linux-gcc (GCC) 11.2.0 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/davidhildenbrand/linux/commit/d3eb6d68346c3d9e89ae68461e0eabb5bc7def17 git remote add davidhildenbrand git://github.com/davidhildenbrand/linux git fetch --no-tags davidhildenbrand unshare_new git checkout d3eb6d68346c3d9e89ae68461e0eabb5bc7def17 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=sparc SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from mm/huge_memory.c:8: include/linux/mm.h: In function 'page_needs_cow_for_dma': include/linux/mm.h:1384:31: error: implicit declaration of function 'PageAnonUnshared' [-Werror=implicit-function-declaration] 1384 | if (PageAnon(page) && PageAnonUnshared(page)) { | ^~~~~~~~~~~~~~~~ include/linux/mm.h:1386:25: error: implicit declaration of function 'ClearPageAnonUnshared' [-Werror=implicit-function-declaration] 1386 | ClearPageAnonUnshared(page); | ^~~~~~~~~~~~~~~~~~~~~ mm/huge_memory.c: In function 'follow_trans_huge_pmd': >> mm/huge_memory.c:1381:13: error: too few arguments to function 'gup_must_unshare' 1381 | if (gup_must_unshare(flags, page)) { | ^~~~~~~~~~~~~~~~ In file included from mm/huge_memory.c:8: include/linux/mm.h:3086:13: note: declared here 3086 | extern bool gup_must_unshare(unsigned int flags, struct page *page, | ^~~~~~~~~~~~~~~~ >> mm/huge_memory.c:1382:22: error: implicit declaration of function 'mark_anon_page_shared' [-Werror=implicit-function-declaration] 1382 | if (!mark_anon_page_shared(page, pmd_write(pmd))) | ^~~~~~~~~~~~~~~~~~~~~ >> mm/huge_memory.c:1382:60: error: incompatible type for argument 1 of 'pmd_write' 1382 | if (!mark_anon_page_shared(page, pmd_write(pmd))) | ^~~ | | | pmd_t * In file included from arch/sparc/include/asm/pgtable.h:5, from include/linux/pgtable.h:6, from include/linux/mm.h:33, from mm/huge_memory.c:8: arch/sparc/include/asm/pgtable_64.h:698:45: note: expected 'pmd_t' but argument is of type 'pmd_t *' 698 | static inline unsigned long pmd_write(pmd_t pmd) | ~~~~~~^~~ cc1: some warnings being treated as errors
vim +/gup_must_unshare +1381 mm/huge_memory.c
1352 1353 struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, 1354 unsigned long addr, 1355 pmd_t *pmd, 1356 unsigned int flags) 1357 { 1358 struct mm_struct *mm = vma->vm_mm; 1359 struct page *page = NULL; 1360 1361 assert_spin_locked(pmd_lockptr(mm, pmd)); 1362 1363 if (flags & FOLL_WRITE && !can_follow_write_pmd(*pmd, flags)) 1364 goto out; 1365 1366 /* Avoid dumping huge zero page */ 1367 if ((flags & FOLL_DUMP) && is_huge_zero_pmd(*pmd)) 1368 return ERR_PTR(-EFAULT); 1369 1370 /* Full NUMA hinting faults to serialise migration in fault paths */ 1371 if ((flags & FOLL_NUMA) && pmd_protnone(*pmd)) 1372 goto out; 1373 1374 page = pmd_page(*pmd); 1375 VM_BUG_ON_PAGE(!PageHead(page) && !is_zone_device_page(page), page); 1376 1377 /* 1378 * If unsharing is required, keep retrying to unshare until the 1379 * page becomes exclusive. 1380 */ > 1381 if (gup_must_unshare(flags, page)) { > 1382 if (!mark_anon_page_shared(page, pmd_write(pmd))) 1383 return ERR_PTR(-EMLINK); 1384 } 1385 1386 if (!try_grab_page(page, flags)) 1387 return ERR_PTR(-ENOMEM); 1388 1389 if (flags & FOLL_TOUCH) 1390 touch_pmd(vma, addr, pmd, flags); 1391 1392 if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) { 1393 /* 1394 * We don't mlock() pte-mapped THPs. This way we can avoid 1395 * leaking mlocked pages into non-VM_LOCKED VMAs. 1396 * 1397 * For anon THP: 1398 * 1399 * In most cases the pmd is the only mapping of the page as we 1400 * break COW for the mlock() -- see gup_flags |= FOLL_WRITE for 1401 * writable private mappings in populate_vma_page_range(). 1402 * 1403 * The only scenario when we have the page shared here is if we 1404 * mlocking read-only mapping shared over fork(). We skip 1405 * mlocking such pages. 1406 * 1407 * For file THP: 1408 * 1409 * We can expect PageDoubleMap() to be stable under page lock: 1410 * for file pages we set it in page_add_file_rmap(), which 1411 * requires page to be locked. 1412 */ 1413 1414 if (PageAnon(page) && compound_mapcount(page) != 1) 1415 goto skip_mlock; 1416 if (PageDoubleMap(page) || !page->mapping) 1417 goto skip_mlock; 1418 if (!trylock_page(page)) 1419 goto skip_mlock; 1420 if (page->mapping && !PageDoubleMap(page)) 1421 mlock_vma_page(page); 1422 unlock_page(page); 1423 } 1424 skip_mlock: 1425 page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT; 1426 VM_BUG_ON_PAGE(!PageCompound(page) && !is_zone_device_page(page), page); 1427 1428 out: 1429 return page; 1430 } 1431
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