[linux-next:master 3751/4668] fs/btrfs/compression.o: warning: objtool: btrfs_submit_compressed_read()+0x7ab: unreachable instruction

[linux-next:master 3751/4668] fs/btrfs/compression.o: warning: objtool: btrfs_submit_compressed_read()+0x7ab: unreachable instruction

[kernel test robot]

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CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Qu Wenruo <wqu@suse.com>
CC: David Sterba <dsterba@suse.com>
CC: Anand Jain <anand.jain@oracle.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   8d4b477da1a807199ca60e0829357ce7aa6758d5
commit: 3892f97ef6f4f710c92c513b67d4971f3e6c97bb [3751/4668] btrfs: grab correct extent map for subpage compressed extent read
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/next/linux-next.git/commit/?id=3892f97ef6f4f710c92c513b67d4971f3e6c97bb
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3892f97ef6f4f710c92c513b67d4971f3e6c97bb
        # 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/ mm//

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/btrfs/compression.o: warning: objtool: btrfs_submit_compressed_read()+0x7ab: 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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