Hi Zong, url: https://github.com/0day-ci/linux/commits/Zong-Li/Get-cache-information-from-userland/20200827-162439 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 15bc20c6af4ceee97a1f90b43c0e386643c071b4 config: riscv-randconfig-m031-20200828 (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> smatch warnings: arch/riscv/kernel/cacheinfo.c:55 get_cache_geometry() warn: variable dereferenced before check 'this_leaf' (see line 52) # https://github.com/0day-ci/linux/commit/a51c248ba0626069792c3f84c8879f685f4a1ff6 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zong-Li/Get-cache-information-from-userland/20200827-162439 git checkout a51c248ba0626069792c3f84c8879f685f4a1ff6 vim +/this_leaf +55 arch/riscv/kernel/cacheinfo.c a51c248ba06260 Zong Li 2020-08-27 49 uintptr_t get_cache_geometry(u32 level, enum cache_type type) a51c248ba06260 Zong Li 2020-08-27 50 { a51c248ba06260 Zong Li 2020-08-27 51 struct cacheinfo *this_leaf = get_cacheinfo(level, type); a51c248ba06260 Zong Li 2020-08-27 @52 uintptr_t ret = (this_leaf->ways_of_associativity << 16 | a51c248ba06260 Zong Li 2020-08-27 53 this_leaf->coherency_line_size); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dereferenced a51c248ba06260 Zong Li 2020-08-27 54 a51c248ba06260 Zong Li 2020-08-27 @55 return this_leaf ? ret : 0; ^^^^^^^^^ Checked too late. a51c248ba06260 Zong Li 2020-08-27 56 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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