linux-kernel - [jgunthorpe:iommufd 7/8] drivers/iommu/iommufd/device.c:121:40: warning: variable 'ioaspt' set but not used

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Date:   Thu, 18 Nov 2021 02:17:22 +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 7/8] drivers/iommu/iommufd/device.c:121:40:
 warning: variable 'ioaspt' set but not used

tree:   https://github.com/jgunthorpe/linux iommufd
head:   4d06b5807e799e0293171d872d8c1a40f3b466c5
commit: 1f7a895af0da6f3df99882a45562e0fcd4812365 [7/8] mad musings
config: arc-allyesconfig (attached as .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/1f7a895af0da6f3df99882a45562e0fcd4812365
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe iommufd
        git checkout 1f7a895af0da6f3df99882a45562e0fcd4812365
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 

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:121:40: warning: variable 'ioaspt' set but not used [-Wunused-but-set-variable]
     121 |         struct iommufd_ioas_pagetable *ioaspt;
         |                                        ^~~~~~


vim +/ioaspt +121 drivers/iommu/iommufd/device.c

   118	
   119	static int iommufd_device_attach_sw(struct iommufd_device *idev, u32 *pt_id)
   120	{
 > 121		struct iommufd_ioas_pagetable *ioaspt;
   122		struct iommufd_object *obj;
   123	
   124		obj = iommufd_get_object(idev->ictx, *pt_id,
   125					 IOMMUFD_OBJ_IOAS_PAGETABLE);
   126		if (IS_ERR(obj))
   127			return PTR_ERR(obj);
   128		ioaspt = container_of(obj, struct iommufd_ioas_pagetable, obj);
   129		iommufd_put_object_keep_user(obj);
   130		//idev->ioaspt = ioaspt;
   131		return 0;
   132	}
   133	

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

Download attachment ".config.gz" of type "application/gzip" (70101 bytes)