linux-kernel - Re: [patch 11/27] dm exception store: refactor zero

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Date:	Thu, 23 Oct 2008 22:36:39 -0700
From:	Greg KH <greg@...ah.com>
To:	Alasdair G Kergon <agk@...hat.com>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org, jejb@...nel.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>, Willy Tarreau <w@....eu>,
	Rodrigo Rubira Branco <rbranco@...checkpoint.com>,
	Jake Edge <jake@....net>, Eugene Teo <eteo@...hat.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Alasdair G Kergon <agk@...hat.com>,
	Mikulas Patocka <mpatocka@...hat.com>
Subject: Re: [patch 11/27] dm exception store: refactor zero_area

On Thu, Oct 23, 2008 at 09:34:23PM -0700, Greg KH wrote:
> 2.6.27-stable review patch.  If anyone has any objections, please let us 
> know.
> 
> ------------------
> From: Alasdair G Kergon <agk@...hat.com>
> 
> commit 7c9e6c17325fab380fbe9c9787680ff7d4a51abd upstream
> 
> Use a separate buffer for writing zeroes to the on-disk snapshot
> exception store, make the updating of ps->current_area explicit and
> refactor the code in preparation for the fix in the next patch.
> 
> No functional change.
> 
> Signed-off-by: Alasdair G Kergon <agk@...hat.com>
> Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> 
> ---
>  drivers/md/dm-exception-store.c |  103 ++++++++++++++++++++++++++--------------
>  1 file changed, 69 insertions(+), 34 deletions(-)

Oops, this patch causes a build error:

drivers/md/dm-exception-store.c:235: error: implicit declaration of function 'area_location'
drivers/md/dm-exception-store.c:241: error: 'area' undeclared (first use in this function)
drivers/md/dm-exception-store.c:241: error: (Each undeclared identifier is reported only once
drivers/md/dm-exception-store.c:241: error: for each function it appears in.)

I'll drop this one, and the follow-on dm-exception-store.c patch as
well, as that was the only reason this patch was added.

If you want to redo these two patches, and get them into the
2.6.27-stable tree, please do so and send them to stable@...nel.org.

thanks,

greg k-h
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