Re: [PATCH 1/8] dma-buf: protected fence ops by RCU v7

[kernel test robot <lkp@intel.com>]

Hi Christian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[cannot apply to drm-i915/for-linux-next drm-i915/for-linux-next-fixes drm-xe/drm-xe-next linus/master v6.19 next-20260220]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Christian-K-nig/dma-buf-detach-fence-ops-on-signal-v2/20260220-010804
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260219160822.1529-2-christian.koenig%40amd.com
patch subject: [PATCH 1/8] dma-buf: protected fence ops by RCU v7
config: m68k-randconfig-r111-20260221 (https://download.01.org/0day-ci/archive/20260221/202602212224.vH1Jr91w-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260221/202602212224.vH1Jr91w-lkp@intel.com/reproduce)

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/202602212224.vH1Jr91w-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/drm_crtc.c:161:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/drm_crtc.c:161:9: sparse:    struct dma_fence_ops const [noderef] __rcu *
   drivers/gpu/drm/drm_crtc.c:161:9: sparse:    struct dma_fence_ops const *
--
   drivers/gpu/drm/scheduler/sched_fence.c:241:1: sparse: sparse: bad integer constant expression
   drivers/gpu/drm/scheduler/sched_fence.c:241:1: sparse: sparse: static assertion failed: "MODULE_INFO(description, ...) contains embedded NUL byte"
   drivers/gpu/drm/scheduler/sched_fence.c:242:1: sparse: sparse: bad integer constant expression
   drivers/gpu/drm/scheduler/sched_fence.c:242:1: sparse: sparse: static assertion failed: "MODULE_INFO(license, ...) contains embedded NUL byte"
>> drivers/gpu/drm/scheduler/sched_fence.c:198:20: sparse: sparse: incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/scheduler/sched_fence.c:198:20: sparse:    struct dma_fence_ops const [noderef] __rcu *
   drivers/gpu/drm/scheduler/sched_fence.c:198:20: sparse:    struct dma_fence_ops const *
   drivers/gpu/drm/scheduler/sched_fence.c:201:20: sparse: sparse: incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/scheduler/sched_fence.c:201:20: sparse:    struct dma_fence_ops const [noderef] __rcu *
   drivers/gpu/drm/scheduler/sched_fence.c:201:20: sparse:    struct dma_fence_ops const *

vim +161 drivers/gpu/drm/drm_crtc.c

35f8cc3b9a92c6 Gustavo Padovan 2016-12-06  158  
6d6003c4b613c9 Gustavo Padovan 2016-11-15  159  static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
6d6003c4b613c9 Gustavo Padovan 2016-11-15  160  {
6d6003c4b613c9 Gustavo Padovan 2016-11-15 @161  	BUG_ON(fence->ops != &drm_crtc_fence_ops);
6d6003c4b613c9 Gustavo Padovan 2016-11-15  162  	return container_of(fence->lock, struct drm_crtc, fence_lock);
6d6003c4b613c9 Gustavo Padovan 2016-11-15  163  }
6d6003c4b613c9 Gustavo Padovan 2016-11-15  164  

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