>From 31fc1ccab9f3f136af32d8319eac0ecfbf034a3b Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Mon, 22 Oct 2012 17:41:20 +0200
Subject: [PATCH] Debug setting page dirty on RO filesystem

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ext3/inode.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 7e87e37..a0ca1f5 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1963,6 +1963,7 @@ out:
  */
 static int ext3_journalled_set_page_dirty(struct page *page)
 {
+	WARN_ON(page->mapping && page->mapping->host && IS_RDONLY(page->mapping->host));
 	SetPageChecked(page);
 	return __set_page_dirty_nobuffers(page);
 }
-- 
1.7.1