[linux-next:master 2885/4500] drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:929:24: warning: unused variable 'adev'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   93bf8b946e5f9a0b0c68155597b53fd8ccce2827
commit: 8f66090b7bb7f2a2183f46e72e367922d836e0dd [2885/4500] drm/amdgpu: Remove references to struct drm_device.pdev
config: mips-randconfig-r016-20210118 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 95d146182fdf2315e74943b93fb3bb0cbafc5d89)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=8f66090b7bb7f2a2183f46e72e367922d836e0dd
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 8f66090b7bb7f2a2183f46e72e367922d836e0dd
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

quoted

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:929:24: warning: unused variable 'adev'

   struct amdgpu_device = drm_to_adev(dev);
   ^
   fatal error: error in backend: Nested variants found in inline asm string: ' .set push
   .set mips64r2
   .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/atomic.h", .line = 154, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
   1: ll $1, $2 # atomic_fetch_sub
   subu $0, $1, $3
   sc $0, $2
   beqz $0, 1b
   .set pop
   move $0, $1
   '
   clang-12: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 12.0.0 (git://gitmirror/llvm_project 95d146182fdf2315e74943b93fb3bb0cbafc5d89)
   Target: mips-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-95d146182f/bin
   clang-12: note: diagnostic msg:
   Makefile arch drivers include kernel scripts source usr


vim +/adev +929 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

   923	
   924	struct drm_framebuffer *
   925	amdgpu_display_user_framebuffer_create(struct drm_device *dev,
   926					       struct drm_file *file_priv,
   927					       const struct drm_mode_fb_cmd2 *mode_cmd)
   928	{
 > 929		struct amdgpu_device *adev = drm_to_adev(dev);
   930		struct drm_gem_object *obj;
   931		struct amdgpu_framebuffer *amdgpu_fb;
   932		int ret;
   933	
   934		obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
   935		if (obj ==  NULL) {
   936			drm_dbg_kms(dev, "No GEM object associated to handle 0x%08X, "
   937				    "can't create framebuffer\n", mode_cmd->handles[0]);
   938			return ERR_PTR(-ENOENT);
   939		}
   940	
   941		/* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
   942		if (obj->import_attach) {
   943			drm_dbg_kms(dev, "Cannot create framebuffer from imported dma_buf\n");
   944			return ERR_PTR(-EINVAL);
   945		}
   946	
   947		amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
   948		if (amdgpu_fb == NULL) {
   949			drm_gem_object_put(obj);
   950			return ERR_PTR(-ENOMEM);
   951		}
   952	
   953		ret = amdgpu_display_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
   954		if (ret) {
   955			kfree(amdgpu_fb);
   956			drm_gem_object_put(obj);
   957			return ERR_PTR(ret);
   958		}
   959	
   960		return &amdgpu_fb->base;
   961	}
   962	

---
0-DAY CI Kernel Test Service, Intel Corporation
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