* [linux-stable-rc:linux-5.15.y 9996/9999] arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension
@ 2023-04-29 20:56 kernel test robot
2023-04-29 22:45 ` Palmer Dabbelt
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2023-04-29 20:56 UTC (permalink / raw)
To: Alexandre Ghiti
Cc: llvm, oe-kbuild-all, Greg Kroah-Hartman, Conor Dooley, Palmer Dabbelt
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y
head: 64fb7ad7e758c85ebeb0c8c500e4175c65bf5778
commit: 067df57aea8ea9d1d84c53d9925d58759ac90824 [9996/9999] riscv: Move early dtb mapping into the fixmap region
config: riscv-randconfig-r026-20230430 (https://download.01.org/0day-ci/archive/20230430/202304300429.SXZOA5up-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b1465cd49efcbc114a75220b153f5a055ce7911f)
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
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=067df57aea8ea9d1d84c53d9925d58759ac90824
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-5.15.y
git checkout 067df57aea8ea9d1d84c53d9925d58759ac90824
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/mm/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304300429.SXZOA5up-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension [-Wdeclaration-after-statement]
unsigned long idx = pgd_index(__fix_to_virt(FIX_FDT));
^
1 warning generated.
vim +755 arch/riscv/mm/init.c
731
732 static void __init setup_vm_final(void)
733 {
734 uintptr_t va, map_size;
735 phys_addr_t pa, start, end;
736 u64 i;
737
738 /**
739 * MMU is enabled at this point. But page table setup is not complete yet.
740 * fixmap page table alloc functions should be used at this point
741 */
742 pt_ops.alloc_pte = alloc_pte_fixmap;
743 pt_ops.get_pte_virt = get_pte_virt_fixmap;
744 #ifndef __PAGETABLE_PMD_FOLDED
745 pt_ops.alloc_pmd = alloc_pmd_fixmap;
746 pt_ops.get_pmd_virt = get_pmd_virt_fixmap;
747 #endif
748 /* Setup swapper PGD for fixmap */
749 #if !defined(CONFIG_64BIT)
750 /*
751 * In 32-bit, the device tree lies in a pgd entry, so it must be copied
752 * directly in swapper_pg_dir in addition to the pgd entry that points
753 * to fixmap_pte.
754 */
> 755 unsigned long idx = pgd_index(__fix_to_virt(FIX_FDT));
756
757 set_pgd(&swapper_pg_dir[idx], early_pg_dir[idx]);
758 #endif
759 create_pgd_mapping(swapper_pg_dir, FIXADDR_START,
760 __pa_symbol(fixmap_pgd_next),
761 PGDIR_SIZE, PAGE_TABLE);
762
763 /* Map all memory banks in the linear mapping */
764 for_each_mem_range(i, &start, &end) {
765 if (start >= end)
766 break;
767 if (start <= __pa(PAGE_OFFSET) &&
768 __pa(PAGE_OFFSET) < end)
769 start = __pa(PAGE_OFFSET);
770 if (end >= __pa(PAGE_OFFSET) + memory_limit)
771 end = __pa(PAGE_OFFSET) + memory_limit;
772
773 map_size = best_map_size(start, end - start);
774 for (pa = start; pa < end; pa += map_size) {
775 va = (uintptr_t)__va(pa);
776
777 create_pgd_mapping(swapper_pg_dir, va, pa, map_size,
778 pgprot_from_va(va));
779 }
780 }
781
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [linux-stable-rc:linux-5.15.y 9996/9999] arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension
2023-04-29 20:56 [linux-stable-rc:linux-5.15.y 9996/9999] arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension kernel test robot
@ 2023-04-29 22:45 ` Palmer Dabbelt
0 siblings, 0 replies; 2+ messages in thread
From: Palmer Dabbelt @ 2023-04-29 22:45 UTC (permalink / raw)
To: lkp; +Cc: alexghiti, llvm, oe-kbuild-all, Greg KH, Conor Dooley
On Sat, 29 Apr 2023 13:56:13 PDT (-0700), lkp@intel.com wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y
> head: 64fb7ad7e758c85ebeb0c8c500e4175c65bf5778
> commit: 067df57aea8ea9d1d84c53d9925d58759ac90824 [9996/9999] riscv: Move early dtb mapping into the fixmap region
> config: riscv-randconfig-r026-20230430 (https://download.01.org/0day-ci/archive/20230430/202304300429.SXZOA5up-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b1465cd49efcbc114a75220b153f5a055ce7911f)
> 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
> # install riscv cross compiling tool for clang build
> # apt-get install binutils-riscv-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=067df57aea8ea9d1d84c53d9925d58759ac90824
> git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> git fetch --no-tags linux-stable-rc linux-5.15.y
> git checkout 067df57aea8ea9d1d84c53d9925d58759ac90824
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/mm/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202304300429.SXZOA5up-lkp@intel.com/
Thanks, I sent along
https://lore.kernel.org/r/20230429224330.18699-1-palmer@rivosinc.com/
>
> All warnings (new ones prefixed by >>):
>
>>> arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension [-Wdeclaration-after-statement]
> unsigned long idx = pgd_index(__fix_to_virt(FIX_FDT));
> ^
> 1 warning generated.
>
>
> vim +755 arch/riscv/mm/init.c
>
> 731
> 732 static void __init setup_vm_final(void)
> 733 {
> 734 uintptr_t va, map_size;
> 735 phys_addr_t pa, start, end;
> 736 u64 i;
> 737
> 738 /**
> 739 * MMU is enabled at this point. But page table setup is not complete yet.
> 740 * fixmap page table alloc functions should be used at this point
> 741 */
> 742 pt_ops.alloc_pte = alloc_pte_fixmap;
> 743 pt_ops.get_pte_virt = get_pte_virt_fixmap;
> 744 #ifndef __PAGETABLE_PMD_FOLDED
> 745 pt_ops.alloc_pmd = alloc_pmd_fixmap;
> 746 pt_ops.get_pmd_virt = get_pmd_virt_fixmap;
> 747 #endif
> 748 /* Setup swapper PGD for fixmap */
> 749 #if !defined(CONFIG_64BIT)
> 750 /*
> 751 * In 32-bit, the device tree lies in a pgd entry, so it must be copied
> 752 * directly in swapper_pg_dir in addition to the pgd entry that points
> 753 * to fixmap_pte.
> 754 */
> > 755 unsigned long idx = pgd_index(__fix_to_virt(FIX_FDT));
> 756
> 757 set_pgd(&swapper_pg_dir[idx], early_pg_dir[idx]);
> 758 #endif
> 759 create_pgd_mapping(swapper_pg_dir, FIXADDR_START,
> 760 __pa_symbol(fixmap_pgd_next),
> 761 PGDIR_SIZE, PAGE_TABLE);
> 762
> 763 /* Map all memory banks in the linear mapping */
> 764 for_each_mem_range(i, &start, &end) {
> 765 if (start >= end)
> 766 break;
> 767 if (start <= __pa(PAGE_OFFSET) &&
> 768 __pa(PAGE_OFFSET) < end)
> 769 start = __pa(PAGE_OFFSET);
> 770 if (end >= __pa(PAGE_OFFSET) + memory_limit)
> 771 end = __pa(PAGE_OFFSET) + memory_limit;
> 772
> 773 map_size = best_map_size(start, end - start);
> 774 for (pa = start; pa < end; pa += map_size) {
> 775 va = (uintptr_t)__va(pa);
> 776
> 777 create_pgd_mapping(swapper_pg_dir, va, pa, map_size,
> 778 pgprot_from_va(va));
> 779 }
> 780 }
> 781
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-04-29 20:56 [linux-stable-rc:linux-5.15.y 9996/9999] arch/riscv/mm/init.c:755:16: warning: mixing declarations and code is a C99 extension kernel test robot
2023-04-29 22:45 ` Palmer Dabbelt
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