bfs: extra sanity checking and static inode bitmap

bfs: extra sanity checking and static inode bitmap

Strengthen validation of BFS superblock against corruption.  Make in-core
inode bitmap static part of superblock info structure.  Print a warning
when mounting a BFS filesystem created with "-N 512" option as only 510
files can be created in the root directory.  Make the kernel messages more
uniform.  Update the 'prefix' passed to bfs_dump_imap() to match the
current naming of operations.  White space and comments cleanup.

Link: http://lkml.kernel.org/r/CAK+_RLkFZMduoQF36wZFd3zLi-6ZutWKsydjeHFNdtRvZZEb4w@mail.gmail.com
Signed-off-by: Tigran Aivazian <aivazian.tigran@gmail.com>
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>