Hi Guo, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Guo-Weikang/mm-memblock-Modify-the-default-failure-behavior-of-memblock_alloc_raw-to-panic/20250103-185401 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250103105158.1350689-3-guoweikang.kernel%40gmail.com patch subject: [PATCH 3/3] mm/memblock: Modify the default failure behavior of memblock_alloc_low(from) config: sparc-randconfig-001-20250104 (https://download.01.org/0day-ci/archive/20250104/202501041603.0c8v8Wbr-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250104/202501041603.0c8v8Wbr-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202501041603.0c8v8Wbr-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): arch/sparc/mm/init_64.c: In function 'arch_hugetlb_valid_size': arch/sparc/mm/init_64.c:361:24: warning: variable 'hv_pgsz_idx' set but not used [-Wunused-but-set-variable] 361 | unsigned short hv_pgsz_idx; | ^~~~~~~~~~~ arch/sparc/mm/init_64.c: In function 'kernel_map_range': >> arch/sparc/mm/init_64.c:1788:32: warning: variable 'new' set but not used [-Wunused-but-set-variable] 1788 | pud_t *new; | ^~~ arch/sparc/mm/init_64.c: In function 'sun4v_linear_pte_xor_finalize': arch/sparc/mm/init_64.c:2200:23: warning: variable 'pagecv_flag' set but not used [-Wunused-but-set-variable] 2200 | unsigned long pagecv_flag; | ^~~~~~~~~~~ vim +/new +1788 arch/sparc/mm/init_64.c 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1764 896aef430e5afb arch/sparc64/mm/init.c Sam Ravnborg 2008-02-24 1765 static unsigned long __ref kernel_map_range(unsigned long pstart, 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1766 unsigned long pend, pgprot_t prot, 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1767 bool use_huge) 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1768 { 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1769 unsigned long vstart = PAGE_OFFSET + pstart; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1770 unsigned long vend = PAGE_OFFSET + pend; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1771 unsigned long alloc_bytes = 0UL; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1772 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1773 if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { 13edad7a5cef1c arch/sparc64/mm/init.c David S. Miller 2005-09-29 1774 prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n", 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1775 vstart, vend); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1776 prom_halt(); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1777 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1778 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1779 while (vstart < vend) { 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1780 unsigned long this_end, paddr = __pa(vstart); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1781 pgd_t *pgd = pgd_offset_k(vstart); 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1782 p4d_t *p4d; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1783 pud_t *pud; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1784 pmd_t *pmd; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1785 pte_t *pte; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1786 ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 1787 if (pgd_none(*pgd)) { ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 @1788 pud_t *new; ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 1789 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1790 new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1791 PAGE_SIZE); ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 1792 alloc_bytes += PAGE_SIZE; ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 1793 pgd_populate(&init_mm, pgd, new); ac55c768143aa3 arch/sparc/mm/init_64.c David S. Miller 2014-09-26 1794 } 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1795 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1796 p4d = p4d_offset(pgd, vstart); 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1797 if (p4d_none(*p4d)) { 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1798 pud_t *new; 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1799 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1800 new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1801 PAGE_SIZE); 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1802 alloc_bytes += PAGE_SIZE; 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1803 p4d_populate(&init_mm, p4d, new); 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1804 } 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1805 5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 1806 pud = pud_offset(p4d, vstart); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1807 if (pud_none(*pud)) { 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1808 pmd_t *new; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1809 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1810 if (kernel_can_map_hugepud(vstart, vend, use_huge)) { 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1811 vstart = kernel_map_hugepud(vstart, vend, pud); 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1812 continue; 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1813 } 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1814 new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1815 PAGE_SIZE); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1816 alloc_bytes += PAGE_SIZE; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1817 pud_populate(&init_mm, pud, new); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1818 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1819 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1820 pmd = pmd_offset(pud, vstart); 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1821 if (pmd_none(*pmd)) { 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1822 pte_t *new; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1823 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1824 if (kernel_can_map_hugepmd(vstart, vend, use_huge)) { 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1825 vstart = kernel_map_hugepmd(vstart, vend, pmd); 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1826 continue; 0dd5b7b09e13da arch/sparc/mm/init_64.c David S. Miller 2014-09-24 1827 } 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1828 new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, 4fc4a09e4cc112 arch/sparc/mm/init_64.c Mike Rapoport 2018-10-30 1829 PAGE_SIZE); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1830 alloc_bytes += PAGE_SIZE; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1831 pmd_populate_kernel(&init_mm, pmd, new); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1832 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1833 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1834 pte = pte_offset_kernel(pmd, vstart); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1835 this_end = (vstart + PMD_SIZE) & PMD_MASK; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1836 if (this_end > vend) 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1837 this_end = vend; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1838 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1839 while (vstart < this_end) { 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1840 pte_val(*pte) = (paddr | pgprot_val(prot)); 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1841 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1842 vstart += PAGE_SIZE; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1843 paddr += PAGE_SIZE; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1844 pte++; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1845 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1846 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1847 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1848 return alloc_bytes; 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1849 } 56425306517ef2 arch/sparc64/mm/init.c David S. Miller 2005-09-25 1850 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
