tree: git://git.infradead.org/users/hch/misc.git hmm-headers head: eacffa71b75f2486263f460f97583c2198f9a830 commit: eacffa71b75f2486263f460f97583c2198f9a830 [1/1] hmm: remove unneeded #includes config: x86_64-randconfig-a014-20200916 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9e3842d60351f986d77dfe0a94f76e4fd895f188) 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 checkout eacffa71b75f2486263f460f97583c2198f9a830 # 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 errors (new ones prefixed by >>): drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:2305:5: warning: no previous prototype for function 'parse_ta_bin_descriptor' [-Wmissing-prototypes] int parse_ta_bin_descriptor(struct psp_context *psp, ^ drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:2305:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int parse_ta_bin_descriptor(struct psp_context *psp, ^ static clflush_cache_range(cpu_addr, (usbc_pd_fw->size & ~(L1_CACHE_BYTES - 1))); ^ 1 warning and 1 error generated. git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc hmm-headers git checkout eacffa71b75f2486263f460f97583c2198f9a830 vim +/clflush_cache_range +2483 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2443 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2444 static ssize_t psp_usbc_pd_fw_sysfs_write(struct device *dev, 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2445 struct device_attribute *attr, 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2446 const char *buf, 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2447 size_t count) 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2448 { 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2449 struct drm_device *ddev = dev_get_drvdata(dev); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2450 struct amdgpu_device *adev = ddev->dev_private; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2451 void *cpu_addr; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2452 dma_addr_t dma_addr; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2453 int ret; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2454 char fw_name[100]; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2455 const struct firmware *usbc_pd_fw; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2456 90f88cdd7c8d6a6 Andrey Grodzovsky 2020-03-04 2457 if (!adev->ip_blocks[AMD_IP_BLOCK_TYPE_PSP].status.late_initialized) { 90f88cdd7c8d6a6 Andrey Grodzovsky 2020-03-04 2458 DRM_INFO("PSP block is not ready yet."); 90f88cdd7c8d6a6 Andrey Grodzovsky 2020-03-04 2459 return -EBUSY; 90f88cdd7c8d6a6 Andrey Grodzovsky 2020-03-04 2460 } 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2461 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2462 snprintf(fw_name, sizeof(fw_name), "amdgpu/%s", buf); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2463 ret = request_firmware(&usbc_pd_fw, fw_name, adev->dev); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2464 if (ret) 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2465 goto fail; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2466 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2467 /* We need contiguous physical mem to place the FW for psp to access */ 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2468 cpu_addr = dma_alloc_coherent(adev->dev, usbc_pd_fw->size, &dma_addr, GFP_KERNEL); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2469 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2470 ret = dma_mapping_error(adev->dev, dma_addr); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2471 if (ret) 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2472 goto rel_buf; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2473 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2474 memcpy_toio(cpu_addr, usbc_pd_fw->data, usbc_pd_fw->size); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2475 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2476 /* 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2477 * x86 specific workaround. 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2478 * Without it the buffer is invisible in PSP. 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2479 * 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2480 * TODO Remove once PSP starts snooping CPU cache 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2481 */ 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2482 #ifdef CONFIG_X86 57430471e2fa60a Andrey Grodzovsky 2019-12-19 @2483 clflush_cache_range(cpu_addr, (usbc_pd_fw->size & ~(L1_CACHE_BYTES - 1))); 6863d60732acf57 Andrey Grodzovsky 2020-03-04 2484 #endif 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2485 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2486 mutex_lock(&adev->psp.mutex); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2487 ret = psp_load_usbc_pd_fw(&adev->psp, dma_addr); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2488 mutex_unlock(&adev->psp.mutex); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2489 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2490 rel_buf: 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2491 dma_free_coherent(adev->dev, usbc_pd_fw->size, cpu_addr, dma_addr); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2492 release_firmware(usbc_pd_fw); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2493 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2494 fail: 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2495 if (ret) { 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2496 DRM_ERROR("Failed to load USBC PD FW, err = %d", ret); 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2497 return ret; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2498 } 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2499 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2500 return count; 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2501 } 57430471e2fa60a Andrey Grodzovsky 2019-12-19 2502 :::::: The code at line 2483 was first introduced by commit :::::: 57430471e2fa60a412e220fa3014567e792aaa6f drm/amdgpu: Add support for USBC PD FW download :::::: TO: Andrey Grodzovsky <andrey.grodzovsky(a)amd.com&gt; :::::: CC: Alex Deucher <alexander.deucher(a)amd.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org