Re: [PATCH v2 2/3] block: don't hide inode from block_device users

[kernel test robot <lkp@intel.com>]

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Hi Pavel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on v5.15-rc5]
[cannot apply to axboe-block/for-next next-20211013]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Pavel-Begunkov/on-top-of-for-5-16-block/20211013-165953
base:    64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/9e538de87cc869bd26a3ca78da49d1437ec8688c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Pavel-Begunkov/on-top-of-for-5-16-block/20211013-165953
        git checkout 9e538de87cc869bd26a3ca78da49d1437ec8688c
        # save the attached .config to linux build tree
        make W=1 ARCH=um SUBARCH=x86_64

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

All warnings (new ones prefixed by >>):

   block/fops.c: In function 'block_ioctl':
   block/fops.c:460:37: error: implicit declaration of function 'bdev_file_inode'; did you mean 'file_inode'? [-Werror=implicit-function-declaration]
     460 |  struct block_device *bdev = I_BDEV(bdev_file_inode(file));
         |                                     ^~~~~~~~~~~~~~~
         |                                     file_inode
>> block/fops.c:460:37: warning: passing argument 1 of 'I_BDEV' makes pointer from integer without a cast [-Wint-conversion]
     460 |  struct block_device *bdev = I_BDEV(bdev_file_inode(file));
         |                                     ^~~~~~~~~~~~~~~~~~~~~
         |                                     |
         |                                     int
   In file included from block/fops.c:9:
   include/linux/blkdev.h:1990:57: note: expected 'struct inode *' but argument is of type 'int'
    1990 | static inline struct block_device *I_BDEV(struct inode *inode)
         |                                           ~~~~~~~~~~~~~~^~~~~
   cc1: some warnings being treated as errors


vim +/I_BDEV +460 block/fops.c

cd82cca7ebfe9c Christoph Hellwig 2021-09-07  457  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  458  static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  459  {
cd82cca7ebfe9c Christoph Hellwig 2021-09-07 @460  	struct block_device *bdev = I_BDEV(bdev_file_inode(file));
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  461  	fmode_t mode = file->f_mode;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  462  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  463  	/*
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  464  	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  465  	 * to updated it before every ioctl.
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  466  	 */
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  467  	if (file->f_flags & O_NDELAY)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  468  		mode |= FMODE_NDELAY;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  469  	else
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  470  		mode &= ~FMODE_NDELAY;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  471  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  472  	return blkdev_ioctl(bdev, mode, cmd, arg);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  473  }
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  474  

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

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