From b8639077abf034824046ed09e779b74c4393031f Mon Sep 17 00:00:00 2001
From: Joern Engel <joern@logfs.org>
Date: Sat, 17 Apr 2010 19:54:27 +0200
Subject: [PATCH] [LogFS] Set s_bdi

Since 32a88aa1 sync() was turned into a NOP for logfs.  Worse, sync()
would not return an error, giving the illusion that writeout had
actually happened.

Afaics jffs2 was broken as well.

Signed-off-by: Joern Engel <joern@logfs.org>
---
 fs/logfs/super.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index d4531eb46d0..dacce3a917a 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -11,6 +11,7 @@
  */
 #include "logfs.h"
 #include <linux/bio.h>
+#include <linux/blkdev.h>
 #include <linux/mtd/mtd.h>
 #include <linux/statfs.h>
 #include <linux/buffer_head.h>
@@ -136,6 +137,10 @@ static int logfs_sb_set(struct super_block *sb, void *_super)
 	sb->s_fs_info = super;
 	sb->s_mtd = super->s_mtd;
 	sb->s_bdev = super->s_bdev;
+	if (sb->s_bdev)
+		sb->s_bdi = &bdev_get_queue(sb->s_bdev)->backing_dev_info;
+	if (sb->s_mtd)
+		sb->s_bdi = sb->s_mtd->backing_dev_info;
 	return 0;
 }
 
-- 
2.20.1