Hi cuiyangpei, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/cuiyangpei/mm-damon-core-add-sysfs-nodes-to-set-last_nr_accesses-weight/20231128-194153 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20231128073440.11894-1-cuiyangpei%40xiaomi.com patch subject: [PATCH 1/2] mm/damon/sysfs: Implement recording feature config: i386-buildonly-randconfig-001-20231128 (https://download.01.org/0day-ci/archive/20231129/202311290021.Jo3VlA8D-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231129/202311290021.Jo3VlA8D-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/202311290021.Jo3VlA8D-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mm/damon/sysfs.c:1415:6: warning: variable 'count' set but not used [-Wunused-but-set-variable] int count = 0; ^ In file included from mm/damon/sysfs.c:2139: >> mm/damon/sysfs-test.h:15:21: error: redefinition of 'nr_damon_targets' static unsigned int nr_damon_targets(struct damon_ctx *ctx) ^ mm/damon/sysfs.c:1411:21: note: previous definition is here static unsigned int nr_damon_targets(struct damon_ctx *ctx) ^ 1 warning and 1 error generated. vim +/nr_damon_targets +15 mm/damon/sysfs-test.h b8ee5575f763c2 SeongJae Park 2023-10-22 14 b8ee5575f763c2 SeongJae Park 2023-10-22 @15 static unsigned int nr_damon_targets(struct damon_ctx *ctx) b8ee5575f763c2 SeongJae Park 2023-10-22 16 { b8ee5575f763c2 SeongJae Park 2023-10-22 17 struct damon_target *t; b8ee5575f763c2 SeongJae Park 2023-10-22 18 unsigned int nr_targets = 0; b8ee5575f763c2 SeongJae Park 2023-10-22 19 b8ee5575f763c2 SeongJae Park 2023-10-22 20 damon_for_each_target(t, ctx) b8ee5575f763c2 SeongJae Park 2023-10-22 21 nr_targets++; b8ee5575f763c2 SeongJae Park 2023-10-22 22 b8ee5575f763c2 SeongJae Park 2023-10-22 23 return nr_targets; b8ee5575f763c2 SeongJae Park 2023-10-22 24 } b8ee5575f763c2 SeongJae Park 2023-10-22 25 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
