linux-kernel - [jgunthorpe:iommufd 31/31] drivers/iommu/iommufd/device.c:122:40: warning: variable 'ioaspt' set but not used

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Message-ID: <202202091306.YxErokC5-lkp@intel.com>
Date:   Wed, 9 Feb 2022 13:20:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jgunthorpe:iommufd 31/31] drivers/iommu/iommufd/device.c:122:40:
 warning: variable 'ioaspt' set but not used

tree:   https://github.com/jgunthorpe/linux iommufd
head:   6b5b3f20ed6b64824c2d447b4f4555fcb390bf3b
commit: 6b5b3f20ed6b64824c2d447b4f4555fcb390bf3b [31/31] mad musings
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220209/202202091306.YxErokC5-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/jgunthorpe/linux/commit/6b5b3f20ed6b64824c2d447b4f4555fcb390bf3b
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe iommufd
        git checkout 6b5b3f20ed6b64824c2d447b4f4555fcb390bf3b
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/iommu/iommufd/

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

All warnings (new ones prefixed by >>):

   drivers/iommu/iommufd/device.c: In function 'iommufd_device_attach_sw':
>> drivers/iommu/iommufd/device.c:122:40: warning: variable 'ioaspt' set but not used [-Wunused-but-set-variable]
     122 |         struct iommufd_ioas_pagetable *ioaspt;
         |                                        ^~~~~~


vim +/ioaspt +122 drivers/iommu/iommufd/device.c

   119	
   120	static int iommufd_device_attach_sw(struct iommufd_device *idev, u32 *pt_id)
   121	{
 > 122		struct iommufd_ioas_pagetable *ioaspt;
   123		struct iommufd_object *obj;
   124	
   125		obj = iommufd_get_object(idev->ictx, *pt_id,
   126					 IOMMUFD_OBJ_IOAS_PAGETABLE);
   127		if (IS_ERR(obj))
   128			return PTR_ERR(obj);
   129		ioaspt = container_of(obj, struct iommufd_ioas_pagetable, obj);
   130		iommufd_put_object_keep_user(obj);
   131		//idev->ioaspt = ioaspt;
   132		return 0;
   133	}
   134	

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