linux-kernel - [119/264] vfs: add "device" tag to /proc/self/mountstats

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Date:	Wed, 09 Nov 2011 13:32:46 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Bryan Schumaker <bjschuma@...app.com>,
	Christoph Hellwig <hch@....de>
Subject: [119/264] vfs: add "device" tag to /proc/self/mountstats

3.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bryan Schumaker <bjschuma@...app.com>

commit a877ee03ac010ded434b77f7831f43cbb1fcc60f upstream.

nfsiostat was failing to find mounted filesystems on kernels after
2.6.38 because of changes to show_vfsstat() by commit
c7f404b40a3665d9f4e9a927cc5c1ee0479ed8f9.  This patch adds back the
"device" tag before the nfs server entry so scripts can parse the
mountstats file correctly.

Signed-off-by: Bryan Schumaker <bjschuma@...app.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/namespace.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1109,6 +1109,7 @@ static int show_vfsstat(struct seq_file
 
 	/* device */
 	if (mnt->mnt_sb->s_op->show_devname) {
+		seq_puts(m, "device ");
 		err = mnt->mnt_sb->s_op->show_devname(m, mnt);
 	} else {
 		if (mnt->mnt_devname) {


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