From 1cd6bf19bbe8098153d7a478d8fc551edbea9305 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Fri, 9 Sep 2005 16:24:00 -0700
Subject: [PATCH] md: add information about superblock version to /proc/mdstat

Leave it unchanged if the original (0.90) is used, incase it might be a
compatability problem.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 39b917b..0a13016 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3346,6 +3346,15 @@ static int md_seq_show(struct seq_file *seq, void *v)
 				seq_printf(seq, "\n      %llu blocks",
 					(unsigned long long)size);
 		}
+		if (mddev->persistent) {
+			if (mddev->major_version != 0 ||
+			    mddev->minor_version != 90) {
+				seq_printf(seq," super %d.%d",
+					   mddev->major_version,
+					   mddev->minor_version);
+			}
+		} else
+			seq_printf(seq, " super non-persistent");
 
 		if (mddev->pers) {
 			mddev->pers->status (seq, mddev);
-- 
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