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Date:	Sun, 21 Apr 2013 15:55:34 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	linux-mm@...ck.org,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	mgorman@...e.de
Subject: Re: [PATCH 3/3] ext4: mark metadata blocks using bh flags

On Sun, Apr 21, 2013 at 08:09:14AM +0200, Jiri Slaby wrote:
> On 04/21/2013 02:07 AM, Theodore Ts'o wrote:
> > This allows metadata writebacks which are issued via block device
> > writeback to be sent with the current write request flags.
> 
> Hi, where do these come from?
> fs/ext4/ext4_jbd2.c: In function ‘__ext4_handle_dirty_metadata’:
> fs/ext4/ext4_jbd2.c:218:2: error: implicit declaration of function
> ‘mark_buffer_meta’ [-Werror=implicit-function-declaration]
> fs/ext4/ext4_jbd2.c:219:2: error: implicit declaration of function
> ‘mark_buffer_prio’ [-Werror=implicit-function-declaration]
> cc1: some warnings being treated as errors

They are defined by "[PATCH 2/3] buffer: add BH_Prio and BH_Meta flags" here:

+BUFFER_FNS(Meta, meta)
+BUFFER_FNS(Prio, prio)

When you tried applying this patch, did you try applying all three
patches in the patch series?

						- Ted
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