tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 36141432a37f7dedddde8825e724b07ce3a440fb commit: 18b5064b5892580f89d7eca015f884ce10190bac [3493/3493] gmem: hmemcpy should use dma for phy addr config: x86_64-randconfig-161-20251208 (https://download.01.org/0day-ci/archive/20251209/202512090002.kbElJ2I7-lkp@i...) 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/20251209/202512090002.kbElJ2I7-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512090002.kbElJ2I7-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/gmem.c: In function 'gm_as_attach':

...

mm/gmem.c:383:13: warning: unused variable 'nid' [-Wunused-variable] 383 | int nid; | ^~~

vim +/nid +383 mm/gmem.c 380709c322aaa3 Cunshu Ni 2025-11-01 378 380709c322aaa3 Cunshu Ni 2025-11-01 379 int gm_as_attach(struct gm_as *as, struct gm_dev *dev, 380709c322aaa3 Cunshu Ni 2025-11-01 380 bool activate, struct gm_context **out_ctx) 380709c322aaa3 Cunshu Ni 2025-11-01 381 { 380709c322aaa3 Cunshu Ni 2025-11-01 382 struct gm_context *ctx; 380709c322aaa3 Cunshu Ni 2025-11-01 @383 int nid; 380709c322aaa3 Cunshu Ni 2025-11-01 384 380709c322aaa3 Cunshu Ni 2025-11-01 385 ctx = kmem_cache_alloc(gm_ctx_cache, GFP_KERNEL); 380709c322aaa3 Cunshu Ni 2025-11-01 386 if (!ctx) 380709c322aaa3 Cunshu Ni 2025-11-01 387 return -ENOMEM; 380709c322aaa3 Cunshu Ni 2025-11-01 388 380709c322aaa3 Cunshu Ni 2025-11-01 389 ctx->as = as; 380709c322aaa3 Cunshu Ni 2025-11-01 390 ctx->dev = dev; 380709c322aaa3 Cunshu Ni 2025-11-01 391 380709c322aaa3 Cunshu Ni 2025-11-01 392 INIT_LIST_HEAD(&ctx->gm_dev_link); 380709c322aaa3 Cunshu Ni 2025-11-01 393 INIT_LIST_HEAD(&ctx->gm_as_link); 380709c322aaa3 Cunshu Ni 2025-11-01 394 380709c322aaa3 Cunshu Ni 2025-11-01 395 if (!list_empty(&as->gm_ctx_list)) { 380709c322aaa3 Cunshu Ni 2025-11-01 396 struct list_head *old_node; 380709c322aaa3 Cunshu Ni 2025-11-01 397 struct gm_context *old_ctx; 380709c322aaa3 Cunshu Ni 2025-11-01 398 380709c322aaa3 Cunshu Ni 2025-11-01 399 old_node = as->gm_ctx_list.prev; 380709c322aaa3 Cunshu Ni 2025-11-01 400 list_del_init(old_node); 380709c322aaa3 Cunshu Ni 2025-11-01 401 old_ctx = list_entry(old_node, struct gm_context, gm_as_link); 380709c322aaa3 Cunshu Ni 2025-11-01 402 kfree(old_ctx); 380709c322aaa3 Cunshu Ni 2025-11-01 403 } 380709c322aaa3 Cunshu Ni 2025-11-01 404 380709c322aaa3 Cunshu Ni 2025-11-01 405 list_add_tail(&dev->gm_ctx_list, &ctx->gm_dev_link); 380709c322aaa3 Cunshu Ni 2025-11-01 406 list_add_tail(&ctx->gm_as_link, &as->gm_ctx_list); 380709c322aaa3 Cunshu Ni 2025-11-01 407 380709c322aaa3 Cunshu Ni 2025-11-01 408 if (activate) { 380709c322aaa3 Cunshu Ni 2025-11-01 409 /* 380709c322aaa3 Cunshu Ni 2025-11-01 410 * Here we should really have a callback function to perform the context switch 380709c322aaa3 Cunshu Ni 2025-11-01 411 * for the hardware. E.g. in x86 this function is effectively 380709c322aaa3 Cunshu Ni 2025-11-01 412 * flushing the CR3 value. Currently we do not care time-sliced context switch, 380709c322aaa3 Cunshu Ni 2025-11-01 413 * unless someone wants to support it. 380709c322aaa3 Cunshu Ni 2025-11-01 414 */ 380709c322aaa3 Cunshu Ni 2025-11-01 415 dev->current_ctx = ctx; 380709c322aaa3 Cunshu Ni 2025-11-01 416 } 380709c322aaa3 Cunshu Ni 2025-11-01 417 *out_ctx = ctx; 380709c322aaa3 Cunshu Ni 2025-11-01 418 380709c322aaa3 Cunshu Ni 2025-11-01 419 /* 380709c322aaa3 Cunshu Ni 2025-11-01 420 * gm_as_attach will be used to attach device to process address space. 380709c322aaa3 Cunshu Ni 2025-11-01 421 * Handle this case and add hnodes registered by device to process mems_allowed. 380709c322aaa3 Cunshu Ni 2025-11-01 422 */ 18b5064b589258 Ni Cunshu 2025-12-08 423 #ifdef CONFIG_CPUSETS 380709c322aaa3 Cunshu Ni 2025-11-01 424 for_each_node_mask(nid, dev->registered_hnodes) 380709c322aaa3 Cunshu Ni 2025-11-01 425 node_set(nid, current->mems_allowed); 18b5064b589258 Ni Cunshu 2025-12-08 426 #endif 380709c322aaa3 Cunshu Ni 2025-11-01 427 return 0; 380709c322aaa3 Cunshu Ni 2025-11-01 428 } 380709c322aaa3 Cunshu Ni 2025-11-01 429 EXPORT_SYMBOL_GPL(gm_as_attach); 2ce9e864fa288b Cunshu Ni 2025-11-02 430 :::::: The code at line 383 was first introduced by commit :::::: 380709c322aaa306b5ac3c278a0700043f7d33e2 gmem: prepare config, boot parameter, vma flag and basic GMEM related structs :::::: TO: Cunshu Ni <nicunshu@huawei.com> :::::: CC: zhangjian <zhangjian496@huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki