fs/configfs/file.o: warning: objtool: configfs_write_iter()+0x225: unreachable instruction

[kernel test robot]

CC: linux-...@vger.kernel.org
TO: Bart Van Assche <bvana...@acm.org>
CC: Christoph Hellwig <h...@lst.de>

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c7d102232649226a69dddd58a4942cf13cff4f7c
commit: 420405ecde061fde76d67bd3a67577a563ea758e configfs: fix the read and write iterators
date: 3 weeks ago
config: x86_64-randconfig-c001-20210803 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4f71f59bf3d9914188a11d0c41bedbb339d36ff5)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=420405ecde061fde76d67bd3a67577a563ea758e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 420405ecde061fde76d67bd3a67577a563ea758e
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/

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

All warnings (new ones prefixed by >>):

>> fs/configfs/file.o: warning: objtool: configfs_write_iter()+0x225: unreachable instruction

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