Below patch reuses the big-endian bitops for the little endian ones, and
moves the ext2_{set,clear}_bit_atomic functions to be truly atomic instead
of lock based.

This requires that the bitmaps passed to the ext2_* bitop functions are
8-byte aligned.  I have been assured that they will be 512-byte or
1024-byte aligned, and sparc and ppc32 also impose an alignment requirement
on the bitmap.
Signed-off-by: Olof Johansson <olof@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>