[PATCH] MD - Don't "analyze_sb" when creating new array.

Don't "analyze_sb" when creating new array.

When creating a new array (and we have an mddev->sb),
don't both to analyze the superblocks.  There is no point.
Also, these means we always allocate the array sb in
analyze_sbs, rather than conditionally.

drivers/md/md.c

@@ -1143,7 +1143,6 @@ static int analyze_sbs(mddev_t * mddev)
 	 * find the freshest superblock, that one will be the superblock
 	 * that represents the whole array.
 	 */
-	if (!mddev->sb)
 	if (alloc_array_sb(mddev))
 		goto abort;
 	sb = mddev->sb;
@@ -1562,7 +1561,7 @@ static int do_md_run(mddev_t * mddev)
 	/*
 	 * Analyze all RAID superblock(s)
 	 */
-	if (analyze_sbs(mddev)) {
+	if (!mddev->sb && analyze_sbs(mddev)) {
 		MD_BUG();
 		return -EINVAL;
 	}