c5f9db2548d0 ("f2fs: drop useless initializer and unneeded local variable")
a4b6817625e7 ("f2fs: introduce periodic iostat io latency traces")
521187439abf ("f2fs: separate out iostat feature")
491f7f71e184 ("f2fs: convert S_IRUGO to 0444")
6b3ba1e77d89 ("f2fs: Kconfig: clean up config options about compression")