From: Josef Bacik <jbacik@fusionio.com>
Date: Mon, 15 Oct 2012 17:30:43 +0000 (-0400)
Subject: Btrfs: move checks in set_page_dirty under DEBUG
X-Git-Tag: Ubuntu-5.0.0-8.9~14638^2~13
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=bb146eb265091f472ada52a3419d41e9b0ff1f7d;p=mirror_ubuntu-disco-kernel.git

Btrfs: move checks in set_page_dirty under DEBUG

This is a high traffic function, let's try and do as little as possible
during normal operations shall we?

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index faf182691b40..b8f7f04a6407 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1001,6 +1001,7 @@ static void btree_invalidatepage(struct page *page, unsigned long offset)
 
 static int btree_set_page_dirty(struct page *page)
 {
+#ifdef DEBUG
 	struct extent_buffer *eb;
 
 	BUG_ON(!PagePrivate(page));
@@ -1009,6 +1010,7 @@ static int btree_set_page_dirty(struct page *page)
 	BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags));
 	BUG_ON(!atomic_read(&eb->refs));
 	btrfs_assert_tree_locked(eb);
+#endif
 	return __set_page_dirty_nobuffers(page);
 }