tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 495206a68b359eb6117d0860861578113bbb94e7 commit: 77cbd63e91fa6c5f6157a30e61a380b6c47c1443 [61/88] mm, cma: support multiple contiguous ranges, if requested config: x86_64-buildonly-randconfig-003-20250131 (https://download.01.org/0day-ci/archive/20250131/202501311125.wbG1DN2B-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250131/202501311125.wbG1DN2B-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/202501311125.wbG1DN2B-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): mm/cma_debug.c: In function 'cma_debugfs_add_one': >> mm/cma_debug.c:189:55: warning: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size 3 [-Wformat-truncation=] 189 | snprintf(rdirname, sizeof(rdirname), "%d", r); | ^~ mm/cma_debug.c:189:54: note: directive argument in the range [-2147483644, 2147483646] 189 | snprintf(rdirname, sizeof(rdirname), "%d", r); | ^~~~ mm/cma_debug.c:189:17: note: 'snprintf' output between 2 and 12 bytes into a destination of size 3 189 | snprintf(rdirname, sizeof(rdirname), "%d", r); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +189 mm/cma_debug.c 168 169 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry) 170 { 171 struct dentry *tmp, *dir, *rangedir; 172 int r; 173 char rdirname[3]; 174 struct cma_memrange *cmr; 175 176 tmp = debugfs_create_dir(cma->name, root_dentry); 177 178 debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops); 179 debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops); 180 debugfs_create_file("count", 0444, tmp, &cma->count, &cma_debugfs_fops); 181 debugfs_create_file("order_per_bit", 0444, tmp, 182 &cma->order_per_bit, &cma_debugfs_fops); 183 debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops); 184 debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops); 185 186 rangedir = debugfs_create_dir("ranges", tmp); 187 for (r = 0; r < cma->nranges; r++) { 188 cmr = &cma->ranges[r]; > 189 snprintf(rdirname, sizeof(rdirname), "%d", r); 190 dir = debugfs_create_dir(rdirname, rangedir); 191 debugfs_create_file("base_pfn", 0444, dir, 192 &cmr->base_pfn, &cma_debugfs_fops); 193 cmr->dfs_bitmap.array = (u32 *)cmr->bitmap; 194 cmr->dfs_bitmap.n_elements = 195 DIV_ROUND_UP(cma_bitmap_maxno(cma, cmr), 196 BITS_PER_BYTE * sizeof(u32)); 197 debugfs_create_u32_array("bitmap", 0444, dir, 198 &cmr->dfs_bitmap); 199 } 200 201 /* 202 * Backward compatible symlinks to range 0 for base_pfn and bitmap. 203 */ 204 debugfs_create_symlink("base_pfn", tmp, "ranges/0/base_pfn"); 205 debugfs_create_symlink("bitmap", tmp, "ranges/0/bitmap"); 206 } 207 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
