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

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

[kernel test robot]

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CC: linux-kernel(a)vger.kernel.org
TO: Bart Van Assche <bvanassche@acm.org>
CC: Christoph Hellwig <hch@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 <lkp@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/kbuild-all(a)lists.01.org

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