ext4: use proper little-endian bitops
authorAkinobu Mita <akinobu.mita@gmail.com>
Thu, 29 Dec 2011 01:32:07 +0000 (20:32 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 29 Dec 2011 01:32:07 +0000 (20:32 -0500)
commit597d508c17a6dcd17770f4dd9da873d93cc15493
treee977644fd79c2f73bd90b78c08075cb53cc65196
parentccb4d7af914e0fe9b2f1022f8ea6c300463fd5e6
ext4: use proper little-endian bitops

ext4_{set,clear}_bit() is defined as __test_and_{set,clear}_bit_le() for
ext4.  Only two ext4_{set,clear}_bit() calls check the return value.  The
rest of calls ignore the return value and they can be replaced with
__{set,clear}_bit_le().

This changes ext4_{set,clear}_bit() from __test_and_{set,clear}_bit_le()
to __{set,clear}_bit_le() and introduces ext4_test_and_{set,clear}_bit()
for the two places where old bit needs to be returned.

This ext4_{set,clear}_bit() change is considered safe, because if someone
uses these macros without noticing the change, new ext4_{set,clear}_bit
don't have return value and causes compiler errors where the return value
is used.

This also removes unused ext4_find_first_zero_bit().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
fs/ext4/ext4.h
fs/ext4/ialloc.c