On Wed, Jun 27, 2018 at 08:59:36AM +1000, Stephen Rothwell wrote:

After merging the btrfs-kdave tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

fs/btrfs/print-tree.c: In function 'print_extent_item':
fs/btrfs/print-tree.c:56:3: error: implicit declaration of function 'btrfs_print_v0_err'; did you mean 'btrfs_print_tree'? [-Werror=implicit-function-declaration]
   btrfs_print_v0_err(eb->fs_info);
   ^~~~~~~~~~~~~~~~~~
   btrfs_print_tree

Should be fixed in today's branch.