tree bce42a0cc5a6675ab50fb6b525e4418b66863fdf
parent aa14edeb994f8f7e223d02ad14780bf2fa719f6d
author Patrick Caulfield <pcaulfie@redhat.com> 1138791891 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1138812790 -0800

[PATCH] device-mapper log bitset: fix endian

Clean up the code responsible for the on-disk mirror logs by using the
set_le_bit test_le_bit functions of ext2.  That makes the BE machines keep the
bitmap internally in LE order - it does mean you can't use any other type of
operations on the bitmap words but that looks to be OK in this instance.  The
efficiency tradeoff is very minimal as you would expect for something that
ext2 uses.

This allows us to remove bits_to_core(), bits_to_disk() and log->disk_bits.

Also increment the mirror log disk version transparently to avoid sharing with
older kernels that suffered from the 64-bit BE bug.

Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>