[kbuild-all] [ammarfaizi2-block:palmer/linux/riscv-sv57 2/4] arch/riscv/mm/init.c:782:83: warning: suggest braces around empty body in an 'if' statement

tree: https://github.com/ammarfaizi2/linux-block palmer/linux/riscv-sv57 head: 8fbdccd2b17335e1881a23865e98c63fcc345938 commit: 677b9eb8810edc6c616a699018a83e24ed0cccab [2/4] riscv: mm: Prepare pt_ops helper functions for sv57 config: riscv-randconfig-r021-20220214 (https://download.01.org/0day-ci/archive/20220215/202202152048.f2hoyu2a-lk...) compiler: riscv32-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/ammarfaizi2/linux-block/commit/677b9eb8810edc6c616a699... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block palmer/linux/riscv-sv57 git checkout 677b9eb8810edc6c616a699018a83e24ed0cccab # 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=riscv SHELL=/bin/bash arch/riscv/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/riscv/mm/init.c: In function 'create_fdt_early_page_table': 782 | (uintptr_t)early_dtb_pud, P4D_SIZE, PAGE_TABLE); | ^ arch/riscv/mm/init.c:786:83: warning: suggest braces around empty body in an 'if' statement [-Wempty-body] 786 | (uintptr_t)early_dtb_pmd, PUD_SIZE, PAGE_TABLE); | ^ arch/riscv/mm/init.c: At top level: arch/riscv/mm/init.c:813:13: warning: no previous prototype for 'pt_ops_set_early' [-Wmissing-prototypes] 813 | void __init pt_ops_set_early(void) | ^~~~~~~~~~~~~~~~ arch/riscv/mm/init.c:835:13: warning: no previous prototype for 'pt_ops_set_fixmap' [-Wmissing-prototypes] 835 | void __init pt_ops_set_fixmap(void) | ^~~~~~~~~~~~~~~~~ arch/riscv/mm/init.c:853:13: warning: no previous prototype for 'pt_ops_set_late' [-Wmissing-prototypes] 853 | void __init pt_ops_set_late(void) | ^~~~~~~~~~~~~~~ vim +/if +782 arch/riscv/mm/init.c 764 765 /* 766 * Setup a 4MB mapping that encompasses the device tree: for 64-bit kernel, 767 * this means 2 PMD entries whereas for 32-bit kernel, this is only 1 PGDIR 768 * entry. 769 */ 770 static void __init create_fdt_early_page_table(pgd_t *pgdir, uintptr_t dtb_pa) 771 { 772 #ifndef CONFIG_BUILTIN_DTB 773 uintptr_t pa = dtb_pa & ~(PMD_SIZE - 1); 774 775 create_pgd_mapping(early_pg_dir, DTB_EARLY_BASE_VA, 776 IS_ENABLED(CONFIG_64BIT) ? early_dtb_pgd_next : pa, 777 PGDIR_SIZE, 778 IS_ENABLED(CONFIG_64BIT) ? PAGE_TABLE : PAGE_KERNEL); 779 780 if (pgtable_l5_enabled) 781 create_p4d_mapping(early_dtb_p4d, DTB_EARLY_BASE_VA, 783 784 if (pgtable_l4_enabled) 785 create_pud_mapping(early_dtb_pud, DTB_EARLY_BASE_VA, 786 (uintptr_t)early_dtb_pmd, PUD_SIZE, PAGE_TABLE); 787 788 if (IS_ENABLED(CONFIG_64BIT)) { 789 create_pmd_mapping(early_dtb_pmd, DTB_EARLY_BASE_VA, 790 pa, PMD_SIZE, PAGE_KERNEL); 791 create_pmd_mapping(early_dtb_pmd, DTB_EARLY_BASE_VA + PMD_SIZE, 792 pa + PMD_SIZE, PMD_SIZE, PAGE_KERNEL); 793 } 794 795 dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PMD_SIZE - 1)); 796 #else 797 /* 798 * For 64-bit kernel, __va can't be used since it would return a linear 799 * mapping address whereas dtb_early_va will be used before 800 * setup_vm_final installs the linear mapping. For 32-bit kernel, as the 801 * kernel is mapped in the linear mapping, that makes no difference. 802 */ 803 dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa)); 804 #endif 805 806 dtb_early_pa = dtb_pa; 807 } 808 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org