From: Byongho Lee <bhlee.kernel@gmail.com>
Date: Tue, 26 Jan 2016 16:33:04 +0000 (+0900)
Subject: btrfs: simplify expression in btrfs_calc_trans_metadata_size()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0138b6fe8f7ea6aa83ed7ccfcabc89b490528ce8;p=deliverable%2Flinux.git

btrfs: simplify expression in btrfs_calc_trans_metadata_size()

Simplify expression in btrfs_calc_trans_metadata_size().

Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Reviewed-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index bfe4a337fb4d..91449e41d88d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3448,8 +3448,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
 						 unsigned num_items)
 {
-	return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
-		2 * num_items;
+	return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
 }
 
 /*