     const struct extent_buffer *eb, int slot,     const char *fmt, ...) {  struct btrfs_key key;  struct va_format vaf;  va_list args;   btrfs_item_key_to_cpu(eb, &key, slot);  va_start(args, fmt);   vaf.fmt = fmt;  vaf.va = &args;   btrfs_crit(fs_info,  "corrupt %s: root=%llu block=%llu slot=%d ino=%llu, %pV",   btrfs_header_level(eb) == 0 ? "leaf" : "node",   btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,   key.objectid, 