ubifs_search_zbranch
err = ubifs_search_zbranch(c, zp, &zbr->key, &n);
exact = ubifs_search_zbranch(c, znode, key, n);
exact = ubifs_search_zbranch(c, znode, key, n);
ubifs_search_zbranch(c, znode, key, &n);
ubifs_search_zbranch(c, znode, key, &n);
int ubifs_search_zbranch(const struct ubifs_info *c,