a84153f93980 ("f2fs: fix to update age extent in f2fs_do_zero_range()")
e7547daccd6a ("f2fs: refactor extent_cache to support for read and more")
749d543c0d45 ("f2fs: remove unnecessary __init_extent_tree")
3bac20a8f011 ("f2fs: move internal functions into extent_cache.c")
12607c1ba763 ("f2fs: specify extent cache for read explicitly")