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    SubjectRe: [patch 11/27] dm exception store: refactor zero_area
    On Fri, Oct 24, 2008 at 09:40:04PM -0400, Mikulas Patocka wrote:
    >
    >
    > On Thu, 23 Oct 2008, Greg KH wrote:
    >
    > > 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@redhat.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@redhat.com>
    > > > Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
    > > > Signed-off-by: Greg Kroah-Hartman <gregkh@suse.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@kernel.org.
    > >
    > > thanks,
    > >
    > > greg k-h
    >
    > You should apply this one patch before:
    > ftp://ftp.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-exception-store-introduce-area_location-function.patch

    Hm, so we need 2 "cleanup" patches to get one tiny fix in a third patch?
    Is it worth it? If so, care to resend these three to stable@kernel.org
    or possibly, just backport what you really need in the third one, with
    the needed first 2 patches merged into it in one patch to get it all in
    a simpler way?

    thanks,

    greg k-h


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