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SubjectRe: [PATCH] x86/mm/64: Rename the argument 'size' as 'nr_pages' in register_page_bootmem_memmap
Hi Baoquan,

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.14-rc6 next-20171018]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Baoquan-He/x86-mm-64-Rename-the-argument-size-as-nr_pages-in-register_page_bootmem_memmap/20171026-125956
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

arch/x86//mm/init_64.c: In function 'register_page_bootmem_memmap':
>> arch/x86//mm/init_64.c:1341:15: error: 'nr_pages' redeclared as different kind of symbol
unsigned int nr_pages;
^~~~~~~~
arch/x86//mm/init_64.c:1332:46: note: previous definition of 'nr_pages' was here
struct page *start_page, unsigned long nr_pages)
^~~~~~~~

vim +/nr_pages +1341 arch/x86//mm/init_64.c

c2b91e2ee Yinghai Lu 2008-04-12 1329
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1330 #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HAVE_BOOTMEM_INFO_NODE)
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1331 void register_page_bootmem_memmap(unsigned long section_nr,
b5f7b7e8b Baoquan He 2017-10-24 1332 struct page *start_page, unsigned long nr_pages)
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1333 {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1334 unsigned long addr = (unsigned long)start_page;
b5f7b7e8b Baoquan He 2017-10-24 1335 unsigned long end = (unsigned long)(start_page + nr_pages);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1336 unsigned long next;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1337 pgd_t *pgd;
f2a6a7050 Kirill A. Shutemov 2017-03-17 1338 p4d_t *p4d;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1339 pud_t *pud;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1340 pmd_t *pmd;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 @1341 unsigned int nr_pages;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1342 struct page *page;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1343
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1344 for (; addr < end; addr = next) {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1345 pte_t *pte = NULL;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1346
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1347 pgd = pgd_offset_k(addr);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1348 if (pgd_none(*pgd)) {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1349 next = (addr + PAGE_SIZE) & PAGE_MASK;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1350 continue;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1351 }
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1352 get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1353
f2a6a7050 Kirill A. Shutemov 2017-03-17 1354 p4d = p4d_offset(pgd, addr);
f2a6a7050 Kirill A. Shutemov 2017-03-17 1355 if (p4d_none(*p4d)) {
f2a6a7050 Kirill A. Shutemov 2017-03-17 1356 next = (addr + PAGE_SIZE) & PAGE_MASK;
f2a6a7050 Kirill A. Shutemov 2017-03-17 1357 continue;
f2a6a7050 Kirill A. Shutemov 2017-03-17 1358 }
f2a6a7050 Kirill A. Shutemov 2017-03-17 1359 get_page_bootmem(section_nr, p4d_page(*p4d), MIX_SECTION_INFO);
f2a6a7050 Kirill A. Shutemov 2017-03-17 1360
f2a6a7050 Kirill A. Shutemov 2017-03-17 1361 pud = pud_offset(p4d, addr);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1362 if (pud_none(*pud)) {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1363 next = (addr + PAGE_SIZE) & PAGE_MASK;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1364 continue;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1365 }
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1366 get_page_bootmem(section_nr, pud_page(*pud), MIX_SECTION_INFO);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1367
16bf92261 Borislav Petkov 2016-03-29 1368 if (!boot_cpu_has(X86_FEATURE_PSE)) {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1369 next = (addr + PAGE_SIZE) & PAGE_MASK;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1370 pmd = pmd_offset(pud, addr);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1371 if (pmd_none(*pmd))
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1372 continue;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1373 get_page_bootmem(section_nr, pmd_page(*pmd),
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1374 MIX_SECTION_INFO);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1375
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1376 pte = pte_offset_kernel(pmd, addr);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1377 if (pte_none(*pte))
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1378 continue;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1379 get_page_bootmem(section_nr, pte_page(*pte),
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1380 SECTION_INFO);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1381 } else {
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1382 next = pmd_addr_end(addr, end);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1383
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1384 pmd = pmd_offset(pud, addr);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1385 if (pmd_none(*pmd))
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1386 continue;
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1387
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1388 nr_pages = 1 << (get_order(PMD_SIZE));
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1389 page = pmd_page(*pmd);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1390 while (nr_pages--)
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1391 get_page_bootmem(section_nr, page++,
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1392 SECTION_INFO);
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1393 }
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1394 }
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1395 }
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1396 #endif
46723bfa5 Yasuaki Ishimatsu 2013-02-22 1397

:::::: The code at line 1341 was first introduced by commit
:::::: 46723bfa540f0a1e494476a1734d03626a0bd1e0 memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap

:::::: TO: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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