btrfs: add struct btrfs_eb_prealloc

In further preparation for supporting NOFAIL allocations with retries
outside the critical section, add a struct to carry the extent_buffer
and btrfs_folio_state we need to allocate.

Refactor the allocation pathways to use the new struct but with no
functional change. Wire empty prealloc structs in from callers.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

0 files changed, 0 insertions, 0 deletions