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: um-allnoconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um 

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 >>):

   ld: drivers/char/random.o: in function `blk_queue_debugfs_symlink':
>> random.c:(.text+0x10f0): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:do_mounts.c:(.text+0x10): first defined here
   ld: drivers/base/core.o: in function `blk_queue_debugfs_symlink':
   core.c:(.text+0x800): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:do_mounts.c:(.text+0x10): first defined here
   ld: drivers/base/class.o: in function `blk_queue_debugfs_symlink':
   class.c:(.text+0xd0): multiple definition of `blk_queue_debugfs_symlink'; init/do_mounts.o:do_mounts.c:(.text+0x10): 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