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Message-ID: <202309130832.Qg1tPWee-lkp@intel.com>
Date: Wed, 13 Sep 2023 08:40:40 +0800
From: kernel test robot <lkp@...el.com>
To: Pali Rohár <pali@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Hans de Goede <hdegoede@...hat.com>
Subject: drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgm200.c:32:9: sparse:
sparse: cast truncates bits from constant value (100000000 becomes 0)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3669558bdf354cd352be955ef2764cde6a9bf5ec
commit: 6dd9eb95cb6d895be2827b40fd965d9ec2a0747b platform/x86: dell-wmi: Add WMI event 0x0012 0x0003 to the list
date: 1 year ago
config: i386-randconfig-061-20230909 (https://download.01.org/0day-ci/archive/20230913/202309130832.Qg1tPWee-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230913/202309130832.Qg1tPWee-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/202309130832.Qg1tPWee-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgm200.c:32:9: sparse: sparse: cast truncates bits from constant value (100000000 becomes 0)
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgm200.c:57:9: sparse: sparse: cast truncates bits from constant value (800000000 becomes 0)
vim +32 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgm200.c
5f300fed645597 Ben Skeggs 2017-11-01 26
e12cf6ad43888c Ben Skeggs 2017-11-01 27 static void
e12cf6ad43888c Ben Skeggs 2017-11-01 28 gm200_vmm_pgt_sparse(struct nvkm_vmm *vmm,
e12cf6ad43888c Ben Skeggs 2017-11-01 29 struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
e12cf6ad43888c Ben Skeggs 2017-11-01 30 {
e12cf6ad43888c Ben Skeggs 2017-11-01 31 /* VALID_FALSE + VOL tells the MMU to treat the PTE as sparse. */
e12cf6ad43888c Ben Skeggs 2017-11-01 @32 VMM_FO064(pt, vmm, ptei * 8, BIT_ULL(32) /* VOL. */, ptes);
e12cf6ad43888c Ben Skeggs 2017-11-01 33 }
e12cf6ad43888c Ben Skeggs 2017-11-01 34
:::::: The code at line 32 was first introduced by commit
:::::: e12cf6ad43888c152c3b2edb59525587cd98a227 drm/nouveau/mmu/gm200,gm20b: implement new vmm backend
:::::: TO: Ben Skeggs <bskeggs@...hat.com>
:::::: CC: Ben Skeggs <bskeggs@...hat.com>
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