tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y head: b26f403d01870360392f2fe778304d3a8cba0bef commit: d5ba15e3647df3f2bece61d36cca4a536939623b [4081/13420] dma-buf: heaps: Add Carveout heap to dmabuf heaps config: x86_64-randconfig-r036-20210316 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 50c7504a93fdb90c26870db8c8ea7add895c7725) 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 git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-linux-5.4.y git checkout d5ba15e3647df3f2bece61d36cca4a536939623b # 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 carveout_dma_heap_export(phys_addr_t base, size_t size, const char *name) ^ drivers/dma-buf/heaps/carveout-heap.c:249:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int carveout_dma_heap_export(phys_addr_t base, size_t size, const char *name) ^ static 1 warning generated. vim +/carveout_dma_heap_export +249 drivers/dma-buf/heaps/carveout-heap.c 248 250 { 251 struct carveout_dma_heap *carveout_dma_heap; 252 struct dma_heap_export_info exp_info; 253 int ret; 254 255 carveout_dma_heap = kzalloc(sizeof(*carveout_dma_heap), GFP_KERNEL); 256 if (!carveout_dma_heap) 257 return -ENOMEM; 258 259 carveout_dma_heap->pool = gen_pool_create(PAGE_SHIFT, NUMA_NO_NODE); 260 if (IS_ERR(carveout_dma_heap->pool)) { 261 pr_err("Carveout Heap: Could not create memory pool\n"); 262 ret = PTR_ERR(carveout_dma_heap->pool); 263 goto free_carveout_dma_heap; 264 } 265 ret = gen_pool_add(carveout_dma_heap->pool, base, size, NUMA_NO_NODE); 266 if (ret) { 267 pr_err("Carveout Heap: Could not add memory to pool\n"); 268 goto free_pool; 269 } 270 271 exp_info.name = name; 272 exp_info.ops = &carveout_dma_heap_ops; 273 exp_info.priv = carveout_dma_heap; 274 carveout_dma_heap->heap = dma_heap_add(&exp_info); 275 if (IS_ERR(carveout_dma_heap->heap)) { 276 pr_err("Carveout Heap: Could not add DMA-Heap\n"); 277 ret = PTR_ERR(carveout_dma_heap->heap); 278 goto free_pool; 279 } 280 281 pr_info("Carveout Heap: Exported %zu MiB at %pa\n", size / SZ_1M, &base); 282 283 return 0; 284 285 free_pool: 286 gen_pool_destroy(carveout_dma_heap->pool); 287 free_carveout_dma_heap: 288 kfree(carveout_dma_heap); 289 return ret; 290 } 291 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org