[PATCH v4 0/6] fat: additions to support fat_fallocate

[Namjae Jeon <linkinjeon@gmail.com>]

From: Namjae Jeon <namjae.jeon@samsung.com>

This patch set provides support for doing fallocate operation
on FAT filesystem.
After series of review for the the feature
The complete functionality is broken down into smaller subsets.

v4:
 - ->i_disksize is aligned by block size in fill_inode.
 - use i_disksize when computing the number of cluster for fallocate.
 - make fat_get_block_bmap to avoid race issue.
 - use __fat_write_inode() with inode_needs_sync() in evict.

v3:
 - fix i_disksize and mmu_private comments(uninit/initialized)
 - remove unneeded condition in fat_bmap.
 - use mmu_private instead of fclus in fat_fallocate.
 - make function mark buffer new for block in fallocated region.
 - use flags for bmap.
 - use mmu_private instead of i_size in direct_IO.
 - use flags and remove i_mutex in bmap.
 - update vfat documentation.

v2:
 - remove a stary unlock(from Dan Carpenter)
 - check ->mmu_private and ->i_disksize to truncate uninitialized data.

Namjae Jeon (6):
 fat: add i_disksize to represent uninitialized size
 fat: add fat_fallocate operation
 fat: zero out seek range on _fat_get_block
 fat: fallback to buffered write in case of fallocatded region on direct IO
 fat: permit to return phy block number by fibmap in fallocated region
 fat: update the limitation for fat fallocate

-- 
1.7.11-rc0