Hi Luis,

I love your patch! Yet something to improve:

[auto build test ERROR on block/for-next]
[also build test ERROR on next-20200508]
[cannot apply to mkp-scsi/for-next scsi/for-next linus/master v5.7-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Luis-Chamberlain/block-fix-blktrace-debugfs-use-after-free/20200509-140139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: parisc-allnoconfig (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=parisc 

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

All errors (new ones prefixed by >>):

   hppa-linux-ld: drivers/char/random.o: in function `blk_queue_debugfs_symlink':
>> (.text+0x1130): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:(.text+0x1c): first defined here
   hppa-linux-ld: drivers/base/core.o: in function `blk_queue_debugfs_symlink':
   (.text+0xc18): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:(.text+0x1c): first defined here
   hppa-linux-ld: drivers/base/class.o: in function `blk_queue_debugfs_symlink':
   (.text+0xf8): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:(.text+0x1c): first defined here

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