Pull f2fs bug fixes from Jaegeuk Kim:
"This patch-set includes two major bug fixes:
- incorrect IUsed provided by *df -i*, and
- lookup failure of parent inodes in corner cases.
[Other Bug Fixes]
- Fix error handling routines
- Trigger recovery process correctly
- Resolve build failures due to missing header files
[Etc]
- Add a MAINTAINERS entry for f2fs
- Fix and clean up variables, functions, and equations
- Avoid warnings during compilation"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: unify string length declarations and usage
f2fs: clean up unused variables and return values
f2fs: clean up the start_bidx_of_node function
f2fs: remove unneeded variable from f2fs_sync_fs
f2fs: fix fsync_inode list addition logic and avoid invalid access to memory
f2fs: remove unneeded initialization of nr_dirty in dirty_seglist_info
f2fs: handle error from f2fs_iget_nowait
f2fs: fix equation of has_not_enough_free_secs()
f2fs: add MAINTAINERS entry
f2fs: return a default value for non-void function
f2fs: invalidate the node page if allocation is failed
f2fs: add missing #include <linux/prefetch.h>
f2fs: do f2fs_balance_fs in front of dir operations
f2fs: should recover orphan and fsync data
f2fs: fix handling errors got by f2fs_write_inode
f2fs: fix up f2fs_get_parent issue to retrieve correct parent inode number
f2fs: fix wrong calculation on f_files in statfs
f2fs: remove set_page_dirty for atomic f2fs_end_io_write