From: Zhao Lei <zhaolei@xxxxxxxxxxxxxx>
num_copies's value is not changed in this function,
and it is not necessary to calculate its value multi-times.
Signed-off-by: Zhao Lei <zhaolei@xxxxxxxxxxxxxx>
Signed-off-by: Miao Xie <miaox@xxxxxxxxxxxxxx>
---
fs/btrfs/disk-io.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 11d0ad3..79d9196 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -301,7 +301,8 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
{
struct extent_io_tree *io_tree;
int ret;
- int num_copies = 0;
+ int num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
+ eb->start, eb->len);
int mirror_num = 0;
io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
@@ -312,8 +313,6 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
!verify_parent_transid(io_tree, eb, parent_transid))
return ret;
- num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
- eb->start, eb->len);
if (num_copies == 1)
return ret;
--
1.6.5.2
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