linux-kernel - [PATCH] Btrfs: do not warn_on io_ctl->cur in io_ctl_map

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Date:	Fri, 23 Nov 2012 11:03:14 +0800
From:	Wang Sheng-Hui <shhuiw@...il.com>
To:	chris.mason@...ionio.com, Josef Bacik <jbacik@...ionio.com>,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Btrfs: do not warn_on  io_ctl->cur in io_ctl_map_page

io_ctl_map_page is called by many functions in free-space-cache.
In most scenarios, the ->cur is not null, e.g. io_ctl_add_entry.
I think we'd better remove the warn_on here.

Signed-off-by: Wang Sheng-Hui <shhuiw@...il.com>
---
 fs/btrfs/free-space-cache.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 1027b85..31fcf24 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -307,7 +307,6 @@ static void io_ctl_unmap_page(struct io_ctl *io_ctl)

 static void io_ctl_map_page(struct io_ctl *io_ctl, int clear)
 {
-	WARN_ON(io_ctl->cur);
 	BUG_ON(io_ctl->index >= io_ctl->num_pages);
 	io_ctl->page = io_ctl->pages[io_ctl->index++];
 	io_ctl->cur = kmap(io_ctl->page);
-- 
1.7.5.4
--
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