From ab8d081eed1c60450893aa5faf05d56f1f1edba4 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 25 Jun 2008 16:01:31 -0400
Subject: [PATCH] --- yaml --- r: 128814 b: refs/heads/master c:
 079899c2384023cd8efcd3806680b4f1d2abbd54 h: refs/heads/master v: v3

---
 [refs]                       | 2 +-
 trunk/fs/btrfs/extent-tree.c | 2 --
 trunk/fs/btrfs/extent_io.c   | 7 ++++++-
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index a767d1fce8f4..9464351120d7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e7a84565bcdb239caad29ccbe559ef978090ac7e
+refs/heads/master: 079899c2384023cd8efcd3806680b4f1d2abbd54
diff --git a/trunk/fs/btrfs/extent-tree.c b/trunk/fs/btrfs/extent-tree.c
index a9b3a25a45b7..dc3c03c6612d 100644
--- a/trunk/fs/btrfs/extent-tree.c
+++ b/trunk/fs/btrfs/extent-tree.c
@@ -1438,7 +1438,6 @@ static int pin_down_bytes(struct btrfs_root *root, u64 bytenr, u32 num_bytes,
 	int err = 0;
 
 	if (!pending) {
-#if 0
 		struct extent_buffer *buf;
 		buf = btrfs_find_tree_block(root, bytenr, num_bytes);
 		if (buf) {
@@ -1460,7 +1459,6 @@ static int pin_down_bytes(struct btrfs_root *root, u64 bytenr, u32 num_bytes,
 			}
 			free_extent_buffer(buf);
 		}
-#endif
 		update_pinned_extents(root, bytenr, num_bytes, 1);
 	} else {
 		set_extent_bits(&root->fs_info->pending_del,
diff --git a/trunk/fs/btrfs/extent_io.c b/trunk/fs/btrfs/extent_io.c
index bd15cdcaba95..40a5f53cb040 100644
--- a/trunk/fs/btrfs/extent_io.c
+++ b/trunk/fs/btrfs/extent_io.c
@@ -2808,10 +2808,15 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
 		goto lru_add;
 
 	for (i = 0; i < num_pages; i++, index++) {
-		p = find_lock_page(mapping, index);
+		p = find_get_page(mapping, index);
 		if (!p) {
 			goto fail;
 		}
+		if (TestSetPageLocked(p)) {
+			page_cache_release(p);
+			goto fail;
+		}
+
 		set_page_extent_mapped(p);
 		mark_page_accessed(p);