Btrfs: remove repeated eb->pages check in, disk-io.c/csum_dirty_buffer

In csum_dirty_buffer, we first get eb from page->private.
Then we check if the page is the first page of eb. Later
we check it again. Remove the repeated check here.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8355236..7cda519 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -433,10 +433,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
                WARN_ON(1);
                return 0;
        }
-       if (eb->pages[0] != page) {
-               WARN_ON(1);
-               return 0;
-       }
        if (!PageUptodate(page)) {
                WARN_ON(1);
                return 0;