[kbuild-all] [chao-linux:simple_copy 2/5] block/blk-lib.c:153:5: warning: no previous prototype for function 'blk_copy_offload'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git simple_copy head: d6f32b90156624ae9dc06ef5873334a48e9b9806 commit: fcbd83ffa72af1eba12bcab1f34e0b956a563e02 [2/5] block: add simple copy support config: x86_64-randconfig-a013-20210209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?id... git remote add chao-linux https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git git fetch --no-tags chao-linux simple_copy git checkout fcbd83ffa72af1eba12bcab1f34e0b956a563e02 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int blk_copy_offload(struct block_device *bdev, struct blk_copy_payload *payload, ^ block/blk-lib.c:153:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_copy_offload(struct block_device *bdev, struct blk_copy_payload *payload, ^ static int blk_read_to_buf(struct block_device *bdev, struct blk_copy_payload *payload, ^ block/blk-lib.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_read_to_buf(struct block_device *bdev, struct blk_copy_payload *payload, ^ static int blk_write_from_buf(struct block_device *bdev, void *buf, sector_t dest, ^ block/blk-lib.c:235:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_write_from_buf(struct block_device *bdev, void *buf, sector_t dest, ^ static int blk_prepare_payload(struct block_device *bdev, int nr_srcs, struct range_entry *rlist, ^ block/blk-lib.c:258:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_prepare_payload(struct block_device *bdev, int nr_srcs, struct range_entry *rlist, ^ static 4 warnings generated. vim +/blk_copy_offload +153 block/blk-lib.c 152 154 sector_t dest, gfp_t gfp_mask) 155 { 156 struct bio *bio; 157 int ret, total_size; 158 159 bio = bio_alloc(gfp_mask, 1); 160 bio->bi_iter.bi_sector = dest; 161 bio->bi_opf = REQ_OP_COPY | REQ_NOMERGE; 162 bio_set_dev(bio, bdev); 163 164 total_size = struct_size(payload, range, payload->copy_range); 165 ret = bio_add_page(bio, virt_to_page(payload), total_size, 166 offset_in_page(payload)); 167 if (ret != total_size) { 168 ret = -ENOMEM; 169 bio_put(bio); 170 goto err; 171 } 172 173 ret = submit_bio_wait(bio); 174 err: 175 bio_put(bio); 176 return ret; 177 178 } 179 181 gfp_t gfp_mask, void **buf_p) 182 { 183 struct request_queue *q = bdev_get_queue(bdev); 184 struct bio *bio, *parent = NULL; 185 void *buf = NULL; 186 bool is_vmalloc; 187 int i, nr_srcs, copy_len, ret, cur_size, t_len = 0; 188 189 nr_srcs = payload->copy_range; 190 copy_len = payload->copy_size << SECTOR_SHIFT; 191 192 buf = kvmalloc(copy_len, gfp_mask); 193 if (!buf) 194 return -ENOMEM; 195 is_vmalloc = is_vmalloc_addr(buf); 196 197 for (i = 0; i < nr_srcs; i++) { 198 cur_size = payload->range[i].len << SECTOR_SHIFT; 199 200 bio = bio_map_kern(q, buf + t_len, cur_size, gfp_mask); 201 if (IS_ERR(bio)) { 202 ret = PTR_ERR(bio); 203 goto out; 204 } 205 206 bio->bi_iter.bi_sector = payload->range[i].src; 207 bio->bi_opf = REQ_OP_READ; 208 bio_set_dev(bio, bdev); 209 bio->bi_end_io = NULL; 210 bio->bi_private = NULL; 211 212 if (parent) { 213 bio_chain(parent, bio); 214 submit_bio(parent); 215 } 216 217 parent = bio; 218 t_len += cur_size; 219 } 220 221 ret = submit_bio_wait(bio); 222 bio_put(bio); 223 if (is_vmalloc) 224 invalidate_kernel_vmap_range(buf, copy_len); 225 if (ret) 226 goto out; 227 228 *buf_p = buf; 229 return 0; 230 out: 231 kvfree(buf); 232 return ret; 233 } 234 236 int copy_len, gfp_t gfp_mask) 237 { 238 struct request_queue *q = bdev_get_queue(bdev); 239 struct bio *bio; 240 int ret; 241 242 bio = bio_map_kern(q, buf, copy_len, gfp_mask); 243 if (IS_ERR(bio)) { 244 ret = PTR_ERR(bio); 245 goto out; 246 } 247 bio_set_dev(bio, bdev); 248 bio->bi_opf = REQ_OP_WRITE; 249 bio->bi_iter.bi_sector = dest; 250 251 bio->bi_end_io = NULL; 252 ret = submit_bio_wait(bio); 253 bio_put(bio); 254 out: 255 return ret; 256 } 257 259 gfp_t gfp_mask, struct blk_copy_payload **payload_p) 260 { 261 262 struct request_queue *q = bdev_get_queue(bdev); 263 struct blk_copy_payload *payload; 264 sector_t bs_mask; 265 sector_t src_sects, len = 0, total_len = 0; 266 int i, ret, total_size; 267 268 if (!q) 269 return -ENXIO; 270 271 if (!nr_srcs) 272 return -EINVAL; 273 274 if (bdev_read_only(bdev)) 275 return -EPERM; 276 277 bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1; 278 279 total_size = struct_size(payload, range, nr_srcs); 280 payload = kmalloc(total_size, gfp_mask); 281 if (!payload) 282 return -ENOMEM; 283 284 for (i = 0; i < nr_srcs; i++) { 285 /* copy payload provided are in bytes */ 286 src_sects = rlist[i].src; 287 if (src_sects & bs_mask) { 288 ret = -EINVAL; 289 goto err; 290 } 291 src_sects = src_sects >> SECTOR_SHIFT; 292 293 if (len & bs_mask) { 294 ret = -EINVAL; 295 goto err; 296 } 297 298 len = rlist[i].len >> SECTOR_SHIFT; 299 300 total_len += len; 301 302 WARN_ON_ONCE((src_sects << 9) > UINT_MAX); 303 304 payload->range[i].src = src_sects; 305 payload->range[i].len = len; 306 } 307 308 /* storing # of source ranges */ 309 payload->copy_range = i; 310 /* storing copy len so far */ 311 payload->copy_size = total_len; 312 313 *payload_p = payload; 314 return 0; 315 err: 316 kfree(payload); 317 return ret; 318 } 319 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org