From d1b0a90d2fe11a992c1ddabfd3c3f89ba2368420 Mon Sep 17 00:00:00 2001
From: Nick Piggin <npiggin@suse.de>
Date: Tue, 10 Oct 2006 04:36:54 +0200
Subject: [PATCH] --- yaml --- r: 39201 b: refs/heads/master c:
 ebf7a227dd1d810203a19642655d2fa293f395dd h: refs/heads/master i:   39199:
 b4e1310f4e67a80dab543d7a1e6ca29b19dc4479 v: v3

---
 [refs]            | 2 +-
 trunk/fs/buffer.c | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 3cd6e654ea93..91d6ab51baeb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1601ff0e29cfe112b06aa9bb2fb3519a1125baaa
+refs/heads/master: ebf7a227dd1d810203a19642655d2fa293f395dd
diff --git a/trunk/fs/buffer.c b/trunk/fs/buffer.c
index 16cfbcd254f1..eeb8ac1aa856 100644
--- a/trunk/fs/buffer.c
+++ b/trunk/fs/buffer.c
@@ -701,7 +701,10 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
  */
 int __set_page_dirty_buffers(struct page *page)
 {
-	struct address_space * const mapping = page->mapping;
+	struct address_space * const mapping = page_mapping(page);
+
+	if (unlikely(!mapping))
+		return !TestSetPageDirty(page);
 
 	spin_lock(&mapping->private_lock);
 	if (page_has_buffers(page)) {