F2FS: Upstream updates
f2fs: remove the unused stat_lock
f2fs: cleanup the needless return of f2fs_create_root_stats
f2fs: check name_len of dir entry to prevent from deadloop
F2FS: Updates
f2fs: introduce help macro ADDRS_PER_PAGE()
Merge branch 'kitkat' into kitkat-test
Merge branch 'kitkat-test' of https://github.com/dennes544/purity_kernel_lge_hammerhead_f2fs into kitkat-test