Increment mirror log disk version - it's now always little endian
on disk, so stop if we see a big endian version.

Index: linux-2.6.14/drivers/md/dm-log.c
===================================================================
--- linux-2.6.14.orig/drivers/md/dm-log.c	2005-11-17 22:18:18.000000000 +0000
+++ linux-2.6.14/drivers/md/dm-log.c	2005-11-18 21:34:43.000000000 +0000
@@ -112,7 +112,7 @@ void dm_destroy_dirty_log(struct dirty_l
 /*
  * The on-disk version of the metadata.
  */
-#define MIRROR_DISK_VERSION 1
+#define MIRROR_DISK_VERSION 2
 #define LOG_OFFSET 2
 
 struct log_header {
@@ -218,6 +218,12 @@ static int read_header(struct log_c *log
 		log->header.nr_regions = 0;
 	}
 
+	/* Version 2 is like version 1 but always little endian on disk. */
+#ifdef __LITTLE_ENDIAN
+	if (log->header.version == 1)
+		log->header.version = 2;
+#endif
+
 	if (log->header.version != MIRROR_DISK_VERSION) {
 		DMWARN("incompatible disk log version");
 		return -EINVAL;