tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   5be860bfc73408bc1a8af9167955e480ecebba84
commit: dc9d1af4d02d5c2d84a45450ddad30f6f7630d65 [9245/12617] btrfs: allocate btrfs_io_context without GFP_NOFAIL
config: x86_64-randconfig-r023-20221010
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=dc9d1af4d02d5c2d84a45450ddad30f6f7630d65
        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 dc9d1af4d02d5c2d84a45450ddad30f6f7630d65
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> fs/btrfs/btrfs.o: warning: objtool: __btrfs_map_block+0x1cd1: unreachable instruction


objdump-func vmlinux.o __btrfs_map_block:

-- 
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