Hi Daniel,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to sunxi/sunxi/for-next drm-intel/for-linux-next linus/master linux-arm/drm-armada-devel linux-arm/drm-armada-fixes v5.13-rc7 next-20210622]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Vetter/implicit-fencing-dma-resv-rules-for-shared-buffers/20210623-005623
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-randconfig-s031-20210622 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/42de2bd7635cf7c6d79494a3a35512c53196524f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Vetter/implicit-fencing-dma-resv-rules-for-shared-buffers/20210623-005623
        git checkout 42de2bd7635cf7c6d79494a3a35512c53196524f
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:1727:5: warning: no previous prototype for 'amdgpu_setparam_ioctl' [-Wmissing-prototypes]
    1727 | int amdgpu_setparam_ioctl(struct drm_device *dev, void *data,
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/amdgpu_setparam_ioctl +1727 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

  1726	
> 1727	int amdgpu_setparam_ioctl(struct drm_device *dev, void *data,
  1728				  struct drm_file *filp)
  1729	{
  1730		struct drm_amdgpu_setparam *setparam = data;
  1731		struct amdgpu_fpriv *fpriv = filp->driver_priv;
  1732	
  1733		switch (setparam->param) {
  1734		case AMDGPU_SETPARAM_NO_IMPLICIT_SYNC:
  1735			if (setparam->value)
  1736				WRITE_ONCE(fpriv->vm.no_implicit_sync, true);
  1737			else
  1738				WRITE_ONCE(fpriv->vm.no_implicit_sync, false);
  1739			break;
  1740		default:
  1741			return -EINVAL;
  1742		}
  1743	
  1744		return 0;
  1745	}
  1746	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org