Messages in this thread | | | Date | Mon, 7 Aug 2023 17:35:43 +0800 | From | kernel test robot <> | Subject | Re: [PATCH 1/1] riscv: Implement arch_sync_kernel_mappings() for "preventive" TLB flush |
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Hi Dylan,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master] [also build test WARNING on v6.5-rc5 next-20230807] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Dylan-Jhong/riscv-Implement-arch_sync_kernel_mappings-for-preventive-TLB-flush/20230807-162922 base: linus/master patch link: https://lore.kernel.org/r/20230807082305.198784-2-dylan%40andestech.com patch subject: [PATCH 1/1] riscv: Implement arch_sync_kernel_mappings() for "preventive" TLB flush config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20230807/202308071710.irjERWVF-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230807/202308071710.irjERWVF-lkp@intel.com/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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202308071710.irjERWVF-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/riscv/mm/tlbflush.c:159:6: warning: no previous prototype for 'arch_sync_kernel_mappings' [-Wmissing-prototypes] 159 | void arch_sync_kernel_mappings(unsigned long start, unsigned long end) | ^~~~~~~~~~~~~~~~~~~~~~~~~
vim +/arch_sync_kernel_mappings +159 arch/riscv/mm/tlbflush.c
152 153 /* 154 * Since RISC-V is a microarchitecture that allows caching invalid entries in the TLB, 155 * it is necessary to issue a "preventive" SFENCE.VMA to ensure that each core obtains 156 * the correct kernel mapping. arch_sync_kernel_mappings() will ensure that kernel 157 * page table mappings created via vmap/vmalloc() are updated before switching MM. 158 */ > 159 void arch_sync_kernel_mappings(unsigned long start, unsigned long end)
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