[PATCH v6 0/4] fat: additions to support fat_fallocate

[Namjae Jeon <namjae.jeon@samsung.com>]

This patch set provides support for doing fallocate operation
on FAT filesystem.

v6:
 - Remove usage of i_disksize
 - Align all fallocate code sequence to use i_blocks as 
   this is more or less can be used to denote the on-disksize.
   Also, i_blocks is common in update path of cluster allocation via.
   fat_chain_add() both from normal write path and fallocate() operation 
	  
v5:
 - change all routines to make ->i_disksize aligned by cluster size.
 - merge fat_bmap2() and fat_get_block_bmap(). 

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 (4):
  fat: add fat_fallocate operation
  fat: skip cluster allocation on fallocated region
  fat: permit to return phy block number by fibmap in fallocated region
  Documentation/filesystems/vfat.txt: update the limitation for fat
    fallocate

-- 
1.7.9.5