linux-kernel - drivers/gpu/drm/nouveau/nv10_fence.c:35:40: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202512150150.LLdn83bp-lkp@intel.com>
Date: Mon, 15 Dec 2025 01:48:43 +0800
From: kernel test robot <lkp@...el.com>
To: Ben Skeggs <bskeggs@...dia.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Danilo Krummrich <dakr@...nel.org>
Subject: drivers/gpu/drm/nouveau/nv10_fence.c:35:40: sparse: sparse:
 incorrect type in initializer (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
commit: 0df26c0d69dce1141218e0e5ed0ad378a0c6c058 drm/nouveau: remove push pointer from nouveau_channel
date:   1 year, 5 months ago
config: powerpc64-randconfig-r112-20251212 (https://download.01.org/0day-ci/archive/20251215/202512150150.LLdn83bp-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251215/202512150150.LLdn83bp-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512150150.LLdn83bp-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/nouveau/nv10_fence.c:35:40: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct nvif_push *push @@     got struct nvif_push [noderef] __rcu * @@
   drivers/gpu/drm/nouveau/nv10_fence.c:35:40: sparse:     expected struct nvif_push *push
   drivers/gpu/drm/nouveau/nv10_fence.c:35:40: sparse:     got struct nvif_push [noderef] __rcu *

vim +35 drivers/gpu/drm/nouveau/nv10_fence.c

    31	
    32	int
    33	nv10_fence_emit(struct nouveau_fence *fence)
    34	{
  > 35		struct nvif_push *push = &fence->channel->chan.push;
    36		int ret = PUSH_WAIT(push, 2);
    37		if (ret == 0) {
    38			PUSH_MTHD(push, NV06E, SET_REFERENCE, fence->base.seqno);
    39			PUSH_KICK(push);
    40		}
    41		return ret;
    42	}
    43	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki