From: Wang Sheng-Hui <shhuiw@gmail.com>
Date: Mon, 8 Oct 2012 13:26:15 +0000 (-0600)
Subject: Btrfs: remove repeated eb->pages check in, disk-io.c/csum_dirty_buffer
X-Git-Tag: upstream/snapshot3+hdmi~6337^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1037a5affc266fdfe08b2dd415d309ab2778ce6a;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

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
--- 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;