Hi André, kernel test robot noticed the following build warnings:
[auto build test WARNING on 4dd16e31135ea8437a720222df34e8745f385d6d] url: https://github.com/intel-lab-lkp/linux/commits/Andr-Almeida/treewide-Get-rid-of-get_task_comm/20261030-183832 base: 4dd16e31135ea8437a720222df34e8745f385d6d patch link: https://lore.kernel.org/r/20261030-tonyk-long_name-v8-4-c9b030332254%40igalia.com patch subject: [PATCH v8 4/6] sched: Extend task command name with TASK_COMM_EXT_LEN config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20261101/[email protected]/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261101/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): drivers/gpu/drm/nouveau/nouveau_chan.c: In function 'nouveau_channel_ctor': >> drivers/gpu/drm/nouveau/nouveau_chan.c:343:58: warning: '%s' directive >> output may be truncated writing up to 63 bytes into a region of size 32 >> [-Wformat-truncation=] 343 | snprintf(args->name, __member_size(args->name), "%s[%d]", | ^~ drivers/gpu/drm/nouveau/nouveau_chan.c:343:9: note: 'snprintf' output between 4 and 77 bytes into a destination of size 32 343 | snprintf(args->name, __member_size(args->name), "%s[%d]", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 344 | current->comm, task_pid_nr(current)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +343 drivers/gpu/drm/nouveau/nouveau_chan.c ebb945a94bba2ce Ben Skeggs 2012-07-20 253 5b8a43aeb9cbf6b Marcin Slusarz 2012-08-19 254 static int 5cca41ac70e5877 Ben Skeggs 2024-07-26 255 nouveau_channel_ctor(struct nouveau_cli *cli, bool priv, u64 runm, 06db7fded6dec88 Ben Skeggs 2022-06-01 256 struct nouveau_channel **pchan) ebb945a94bba2ce Ben Skeggs 2012-07-20 257 { 152be54224de182 Danilo Krummrich 2023-10-02 258 const struct nvif_mclass hosts[] = { 284ad706ad2f509 Ben Skeggs 2025-02-04 259 { BLACKWELL_CHANNEL_GPFIFO_B, 0 }, 32cb1cc358ffed2 Ben Skeggs 2024-11-25 260 { BLACKWELL_CHANNEL_GPFIFO_A, 0 }, 44f93b209e2afde Ben Skeggs 2024-11-25 261 { HOPPER_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 262 { AMPERE_CHANNEL_GPFIFO_B, 0 }, 7f4f35ea5b080e6 Ben Skeggs 2022-06-01 263 { AMPERE_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 264 { TURING_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 265 { VOLTA_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 266 { PASCAL_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 267 { MAXWELL_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 268 { KEPLER_CHANNEL_GPFIFO_B, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 269 { KEPLER_CHANNEL_GPFIFO_A, 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 270 { FERMI_CHANNEL_GPFIFO , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 271 { G82_CHANNEL_GPFIFO , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 272 { NV50_CHANNEL_GPFIFO , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 273 { NV40_CHANNEL_DMA , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 274 { NV17_CHANNEL_DMA , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 275 { NV10_CHANNEL_DMA , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 276 { NV03_CHANNEL_DMA , 0 }, 06db7fded6dec88 Ben Skeggs 2022-06-01 277 {} 06db7fded6dec88 Ben Skeggs 2022-06-01 278 }; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 279 DEFINE_RAW_FLEX(struct nvif_chan_v0, args, name, TASK_COMM_LEN + 16); 5cca41ac70e5877 Ben Skeggs 2024-07-26 280 struct nvif_device *device = &cli->device; ebb945a94bba2ce Ben Skeggs 2012-07-20 281 struct nouveau_channel *chan; 06db7fded6dec88 Ben Skeggs 2022-06-01 282 const u64 plength = 0x10000; 06db7fded6dec88 Ben Skeggs 2022-06-01 283 const u64 ioffset = plength; 06db7fded6dec88 Ben Skeggs 2022-06-01 284 const u64 ilength = 0x02000; 06db7fded6dec88 Ben Skeggs 2022-06-01 285 int cid, ret; 06db7fded6dec88 Ben Skeggs 2022-06-01 286 u64 size; 06db7fded6dec88 Ben Skeggs 2022-06-01 287 06db7fded6dec88 Ben Skeggs 2022-06-01 288 cid = nvif_mclass(&device->object, hosts); 06db7fded6dec88 Ben Skeggs 2022-06-01 289 if (cid < 0) 06db7fded6dec88 Ben Skeggs 2022-06-01 290 return cid; 06db7fded6dec88 Ben Skeggs 2022-06-01 291 06db7fded6dec88 Ben Skeggs 2022-06-01 292 if (hosts[cid].oclass < NV50_CHANNEL_GPFIFO) 06db7fded6dec88 Ben Skeggs 2022-06-01 293 size = plength; 06db7fded6dec88 Ben Skeggs 2022-06-01 294 else 06db7fded6dec88 Ben Skeggs 2022-06-01 295 size = ioffset + ilength; ebb945a94bba2ce Ben Skeggs 2012-07-20 296 ebb945a94bba2ce Ben Skeggs 2012-07-20 297 /* allocate dma push buffer */ 5cca41ac70e5877 Ben Skeggs 2024-07-26 298 ret = nouveau_channel_prep(cli, size, &chan); ebb945a94bba2ce Ben Skeggs 2012-07-20 299 *pchan = chan; ebb945a94bba2ce Ben Skeggs 2012-07-20 300 if (ret) ebb945a94bba2ce Ben Skeggs 2012-07-20 301 return ret; ebb945a94bba2ce Ben Skeggs 2012-07-20 302 ebb945a94bba2ce Ben Skeggs 2012-07-20 303 /* create channel object */ e270b3665f8321c Gustavo A. R. Silva 2025-04-16 304 args->version = 0; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 305 args->namelen = __member_size(args->name); e270b3665f8321c Gustavo A. R. Silva 2025-04-16 306 args->runlist = __ffs64(runm); e270b3665f8321c Gustavo A. R. Silva 2025-04-16 307 args->runq = 0; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 308 args->priv = priv; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 309 args->devm = BIT(0); 06db7fded6dec88 Ben Skeggs 2022-06-01 310 if (hosts[cid].oclass < NV50_CHANNEL_GPFIFO) { e270b3665f8321c Gustavo A. R. Silva 2025-04-16 311 args->vmm = 0; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 312 args->ctxdma = nvif_handle(&chan->push.ctxdma); e270b3665f8321c Gustavo A. R. Silva 2025-04-16 313 args->offset = chan->push.addr; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 314 args->length = 0; bbf8906b2cad17c Ben Skeggs 2014-08-10 315 } else { e270b3665f8321c Gustavo A. R. Silva 2025-04-16 316 args->vmm = nvif_handle(&chan->vmm->vmm.object); 06db7fded6dec88 Ben Skeggs 2022-06-01 317 if (hosts[cid].oclass < FERMI_CHANNEL_GPFIFO) e270b3665f8321c Gustavo A. R. Silva 2025-04-16 318 args->ctxdma = nvif_handle(&chan->push.ctxdma); 06db7fded6dec88 Ben Skeggs 2022-06-01 319 else e270b3665f8321c Gustavo A. R. Silva 2025-04-16 320 args->ctxdma = 0; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 321 args->offset = ioffset + chan->push.addr; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 322 args->length = ilength; 06db7fded6dec88 Ben Skeggs 2022-06-01 323 } e270b3665f8321c Gustavo A. R. Silva 2025-04-16 324 args->huserd = 0; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 325 args->ouserd = 0; 06db7fded6dec88 Ben Skeggs 2022-06-01 326 06db7fded6dec88 Ben Skeggs 2022-06-01 327 /* allocate userd */ 06db7fded6dec88 Ben Skeggs 2022-06-01 328 if (hosts[cid].oclass >= VOLTA_CHANNEL_GPFIFO_A) { 06db7fded6dec88 Ben Skeggs 2022-06-01 329 ret = nvif_mem_ctor(&cli->mmu, "abi16ChanUSERD", NVIF_CLASS_MEM_GF100, 06db7fded6dec88 Ben Skeggs 2022-06-01 330 NVIF_MEM_VRAM | NVIF_MEM_COHERENT | NVIF_MEM_MAPPABLE, 06db7fded6dec88 Ben Skeggs 2022-06-01 331 0, PAGE_SIZE, NULL, 0, &chan->mem_userd); 06db7fded6dec88 Ben Skeggs 2022-06-01 332 if (ret) ebb945a94bba2ce Ben Skeggs 2012-07-20 333 return ret; ebb945a94bba2ce Ben Skeggs 2012-07-20 334 e270b3665f8321c Gustavo A. R. Silva 2025-04-16 335 args->huserd = nvif_handle(&chan->mem_userd.object); e270b3665f8321c Gustavo A. R. Silva 2025-04-16 336 args->ouserd = 0; ebb945a94bba2ce Ben Skeggs 2012-07-20 337 06db7fded6dec88 Ben Skeggs 2022-06-01 338 chan->userd = &chan->mem_userd.object; 06db7fded6dec88 Ben Skeggs 2022-06-01 339 } else { 06db7fded6dec88 Ben Skeggs 2022-06-01 340 chan->userd = &chan->user; 06db7fded6dec88 Ben Skeggs 2022-06-01 341 } ebb945a94bba2ce Ben Skeggs 2012-07-20 342 e270b3665f8321c Gustavo A. R. Silva 2025-04-16 @343 snprintf(args->name, __member_size(args->name), "%s[%d]", e270b3665f8321c Gustavo A. R. Silva 2025-04-16 344 current->comm, task_pid_nr(current)); ebb945a94bba2ce Ben Skeggs 2012-07-20 345 06db7fded6dec88 Ben Skeggs 2022-06-01 346 ret = nvif_object_ctor(&device->object, "abi16ChanUser", 0, hosts[cid].oclass, e270b3665f8321c Gustavo A. R. Silva 2025-04-16 347 args, __struct_size(args), &chan->user); 06db7fded6dec88 Ben Skeggs 2022-06-01 348 if (ret) { 06db7fded6dec88 Ben Skeggs 2022-06-01 349 nouveau_channel_del(pchan); ebb945a94bba2ce Ben Skeggs 2012-07-20 350 return ret; bbf8906b2cad17c Ben Skeggs 2014-08-10 351 } ebb945a94bba2ce Ben Skeggs 2012-07-20 352 e270b3665f8321c Gustavo A. R. Silva 2025-04-16 353 chan->runlist = args->runlist; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 354 chan->chid = args->chid; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 355 chan->inst = args->inst; e270b3665f8321c Gustavo A. R. Silva 2025-04-16 356 chan->token = args->token; 06db7fded6dec88 Ben Skeggs 2022-06-01 357 return 0; ebb945a94bba2ce Ben Skeggs 2012-07-20 358 } ebb945a94bba2ce Ben Skeggs 2012-07-20 359 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
