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Re: [PATCH] block: protect rw_page against device teardown

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Hi Dan,

[auto build test ERROR on: block/for-next]
[also build test ERROR on: v4.4-rc1 next-20151119]

url:    https://github.com/0day-ci/linux/commits/Dan-Williams/block-protect-rw_page-against-device-teardown/20151120-081807
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: xtensa-common_defconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All errors (new ones prefixed by >>):

   fs/block_dev.c: In function 'bdev_read_page':
>> fs/block_dev.c:389:2: error: implicit declaration of function 'blk_queue_enter' [-Werror=implicit-function-declaration]
     rc = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
     ^
>> fs/block_dev.c:393:2: error: implicit declaration of function 'blk_queue_exit' [-Werror=implicit-function-declaration]
     blk_queue_exit(bdev->bd_queue);
     ^
   cc1: some warnings being treated as errors

vim +/blk_queue_enter +389 fs/block_dev.c

   383		const struct block_device_operations *ops = bdev->bd_disk->fops;
   384		int rc = -EOPNOTSUPP;
   385	
   386		if (!ops->rw_page || bdev_get_integrity(bdev))
   387			return rc;
   388	
 > 389		rc = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
   390		if (rc)
   391			return rc;
   392		rc = ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ);
 > 393		blk_queue_exit(bdev->bd_queue);
   394		return rc;
   395	}
   396	EXPORT_SYMBOL_GPL(bdev_read_page);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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[PATCH] block: protect rw_page against device teardown Dan Williams <dan.j.williams@intel.com> - 2015-11-20 01:20 +0100
  Re: [PATCH] block: protect rw_page against device teardown kbuild test robot <lkp@intel.com> - 2015-11-20 01:40 +0100
    Re: [PATCH] block: protect rw_page against device teardown "Williams, Dan J" <dan.j.williams@intel.com> - 2015-11-20 02:00 +0100
      Re: [PATCH] block: protect rw_page against device teardown Matthew Wilcox <willy@linux.intel.com> - 2015-11-20 19:20 +0100
        Re: [PATCH] block: protect rw_page against device teardown "Williams, Dan J" <dan.j.williams@intel.com> - 2015-11-20 19:30 +0100

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