[PATCH] device-mapper log bitset: fix big endian find_next_zero_bit

This is a fix to the device-mapper-log-bitset-fix-endian patch that
switched to ext2_* versions of the set and clear bit functions.  The
find_next_zero_bit function also has to be the ext2 one.  Otherwise the
mirror target tries to recover non-existent regions beyond the end of
device.

Signed-off-by: Stefan Bader <shbader@de.ibm.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>

drivers/md/dm-log.c

@@ -545,7 +545,8 @@ static int core_get_resync_work(struct dirty_log *log, region_t *region)
 		return 0;
 
 	do {
-		*region = find_next_zero_bit((unsigned long *) lc->sync_bits,
+		*region = ext2_find_next_zero_bit(
+					     (unsigned long *) lc->sync_bits,
 					     lc->region_count,
 					     lc->sync_search);
 		lc->sync_search = *region + 1;