anchor.diff:    ${optionalString (versionAtLeast version "3.14") ''
       CEPH_FS_POSIX_ACL y
     ''}
  -  SQUASHFS_FILE_DIRECT y
  -  SQUASHFS_DECOMP_MULTI_PERCPU y
  +  ${optionalString (versionAtLeast version "3.13") ''
  +    SQUASHFS_FILE_DIRECT y
  +    SQUASHFS_DECOMP_MULTI_PERCPU y
  +  ''}
     SQUASHFS_XATTR y
     SQUASHFS_ZLIB y
     SQUASHFS_LZO y
     SQUASHFS_XZ y
  +  ${optionalString (versionAtLeast version "3.19") ''
  +    SQUASHFS_LZ4 y
  +  ''}
   
     # Security related features.
     STRICT_DEVMEM y # Filter access to /dev/mem
  
positive.code:   FTRACE_SYSCALLS y
    SCHED_TRACER y
    STACK_TRACER y
    UPROBE_EVENT y
    FUNCTION_PROFILER y
    RING_BUFFER_BENCHMARK n
  
  
negative.code:   XFS_RT? y # XFS Realtime subvolume support
    OCFS2_DEBUG_MASKLOG? n
    BTRFS_FS_POSIX_ACL y
    ${optionalString (versionAtLeast version "3.12") ''
      UBIFS_FS_XATTR? y
    ''}
    UBIFS_FS_ADVANCED_COMPR? y
    ${optionalString (versionAtLeast version "3.6") ''
      NFS_SWAP y
  