linux-kernel - drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse: cast removes address space '_

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Message-ID: <202601140212.9GTXIjNd-lkp@intel.com>
Date: Wed, 14 Jan 2026 03:03:50 +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,
 Dave Airlie <airlied@...hat.com>, Timur Tabi <ttabi@...dia.com>
Subject: drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse:
 cast removes address space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b71e635feefc852405b14620a7fc58c4c80c0f73
commit: b1ca384772b657df433acf0c36f0771d5ebe1138 drm/nouveau/gv100-: switch to volta semaphore methods
date:   8 months ago
config: x86_64-randconfig-121-20260113 (https://download.01.org/0day-ci/archive/20260114/202601140212.9GTXIjNd-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260114/202601140212.9GTXIjNd-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/202601140212.9GTXIjNd-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/gpu/drm/nouveau/gv100_fence.c: note: in included file (through drivers/gpu/drm/nouveau/nouveau_drv.h):
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:9:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:10:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:11:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:12:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:13:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:14:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:17:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:18:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:20:1: sparse: sparse: directive in macro's argument list
   drivers/gpu/drm/nouveau/include/nvif/ioctl.h:21:1: sparse: sparse: directive in macro's argument list
>> drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/gpu/drm/nouveau/gv100_fence.c:25:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:29:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:29:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:35:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:35:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:51:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:51:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:51:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:51:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:55:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/nouveau/gv100_fence.c:55:9: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +25 drivers/gpu/drm/nouveau/gv100_fence.c

    14	
    15	static int
    16	gv100_fence_emit32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
    17	{
    18		struct nvif_push *push = &chan->chan.push;
    19		int ret;
    20	
    21		ret = PUSH_WAIT(push, 8);
    22		if (ret)
    23			return ret;
    24	
  > 25		PUSH_MTHD(push, NVC36F, SEM_ADDR_LO, lower_32_bits(virtual),
    26					SEM_ADDR_HI, upper_32_bits(virtual),
    27					SEM_PAYLOAD_LO, sequence);
    28	
    29		PUSH_MTHD(push, NVC36F, SEM_EXECUTE,
    30			  NVDEF(NVC36F, SEM_EXECUTE, OPERATION, RELEASE) |
    31			  NVDEF(NVC36F, SEM_EXECUTE, RELEASE_WFI, EN) |
    32			  NVDEF(NVC36F, SEM_EXECUTE, PAYLOAD_SIZE, 32BIT) |
    33			  NVDEF(NVC36F, SEM_EXECUTE, RELEASE_TIMESTAMP, DIS));
    34	
    35		PUSH_MTHD(push, NVC36F, NON_STALL_INTERRUPT, 0);
    36	
    37		PUSH_KICK(push);
    38		return 0;
    39	}
    40	

-- 
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