On Wed, Mar 10, 2021 at 1:02 PM kernel test robot <lkp@xxxxxxxxx> wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: b01d57bfdc41c8f635b08b8a5af8a31217d46936 > commit: 3c583493688a0a1276f6a8c0bbc5ece84e77f086 [2778/3213] x86/vmemmap: handle unpopulated sub-pmd ranges > config: x86_64-randconfig-s022-20210309 (attached as .config) > compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 > reproduce: > # apt-get install sparse > # sparse version: v0.6.3-262-g5e674421-dirty > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=3c583493688a0a1276f6a8c0bbc5ece84e77f086 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 3c583493688a0a1276f6a8c0bbc5ece84e77f086 > # save the attached .config to linux build tree > make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All errors (new ones prefixed by >>): > > arch/x86/mm/init_64.c: In function 'vmemmap_populate_hugepages': > >> arch/x86/mm/init_64.c:1583:6: error: implicit declaration of function 'vmemmap_use_new_sub_pmd' [-Werror=implicit-function-declaration] > 1583 | vmemmap_use_new_sub_pmd(addr, next); > | ^~~~~~~~~~~~~~~~~~~~~~~ > >> arch/x86/mm/init_64.c:1589:4: error: implicit declaration of function 'vmemmap_use_sub_pmd' [-Werror=implicit-function-declaration] > 1589 | vmemmap_use_sub_pmd(addr, next); > | ^~~~~~~~~~~~~~~~~~~ > cc1: some warnings being treated as errors > But both the functions are defined in arch/x86/mm/init_64.c. > vim +/vmemmap_use_new_sub_pmd +1583 arch/x86/mm/init_64.c > > 1530 > 1531 static int __meminit vmemmap_populate_hugepages(unsigned long start, > 1532 unsigned long end, int node, struct vmem_altmap *altmap) > 1533 { > 1534 unsigned long addr; > 1535 unsigned long next; > 1536 pgd_t *pgd; > 1537 p4d_t *p4d; > 1538 pud_t *pud; > 1539 pmd_t *pmd; > 1540 > 1541 for (addr = start; addr < end; addr = next) { > 1542 next = pmd_addr_end(addr, end); > 1543 > 1544 pgd = vmemmap_pgd_populate(addr, node); > 1545 if (!pgd) > 1546 return -ENOMEM; > 1547 > 1548 p4d = vmemmap_p4d_populate(pgd, addr, node); > 1549 if (!p4d) > 1550 return -ENOMEM; > 1551 > 1552 pud = vmemmap_pud_populate(p4d, addr, node); > 1553 if (!pud) > 1554 return -ENOMEM; > 1555 > 1556 pmd = pmd_offset(pud, addr); > 1557 if (pmd_none(*pmd)) { > 1558 void *p; > 1559 > 1560 p = vmemmap_alloc_block_buf(PMD_SIZE, node, altmap); > 1561 if (p) { > 1562 pte_t entry; > 1563 > 1564 entry = pfn_pte(__pa(p) >> PAGE_SHIFT, > 1565 PAGE_KERNEL_LARGE); > 1566 set_pmd(pmd, __pmd(pte_val(entry))); > 1567 > 1568 /* check to see if we have contiguous blocks */ > 1569 if (p_end != p || node_start != node) { > 1570 if (p_start) > 1571 pr_debug(" [%lx-%lx] PMD -> [%p-%p] on node %d\n", > 1572 addr_start, addr_end-1, p_start, p_end-1, node_start); > 1573 addr_start = addr; > 1574 node_start = node; > 1575 p_start = p; > 1576 } > 1577 > 1578 addr_end = addr + PMD_SIZE; > 1579 p_end = p + PMD_SIZE; > 1580 > 1581 if (!IS_ALIGNED(addr, PMD_SIZE) || > 1582 !IS_ALIGNED(next, PMD_SIZE)) > > 1583 vmemmap_use_new_sub_pmd(addr, next); > 1584 continue; > 1585 } else if (altmap) > 1586 return -ENOMEM; /* no fallback */ > 1587 } else if (pmd_large(*pmd)) { > 1588 vmemmap_verify((pte_t *)pmd, node, addr, next); > > 1589 vmemmap_use_sub_pmd(addr, next); > 1590 continue; > 1591 } > 1592 if (vmemmap_populate_basepages(addr, next, node, NULL)) > 1593 return -ENOMEM; > 1594 } > 1595 return 0; > 1596 } > 1597 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
