From: Filipe David Borba Manana <fdmanana@gmail.com>
Date: Tue, 26 Nov 2013 15:01:34 +0000 (+0000)
Subject: Btrfs: add missing extent state caching calls
X-Git-Tag: submit/tizen/20160422.055611~1^2~99^2~18^2~2157^2~118
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c42ac0bc9530d51029b938e09b60b5ee86e5ee70;p=sdk%2Femulator%2Femulator-kernel.git

Btrfs: add missing extent state caching calls

When we didn't find a matching extent state, we inserted a new one
but didn't cache it in the **cached_state parameter, which makes a
subsequent call do a tree lookup to get it.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 3721820687d7..01a141245862 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -817,6 +817,7 @@ again:
 		if (err)
 			extent_io_tree_panic(tree, err);
 
+		cache_state(prealloc, cached_state);
 		prealloc = NULL;
 		goto out;
 	}
@@ -1040,9 +1041,10 @@ again:
 			goto out;
 		}
 		err = insert_state(tree, prealloc, start, end, &bits);
-		prealloc = NULL;
 		if (err)
 			extent_io_tree_panic(tree, err);
+		cache_state(prealloc, cached_state);
+		prealloc = NULL;
 		goto out;
 	}
 	state = rb_entry(node, struct extent_state, rb_node);