linux-kernel - Re: mmotm 2011-08-24-14-08 uploaded

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Date:	Thu, 25 Aug 2011 10:12:55 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Johannes Weiner <jweiner@...hat.com>, quilt-dev@...gnu.org
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Michal Hocko <mhocko@...e.cz>, akpm@...ux-foundation.org,
	mm-commits@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-next@...r.kernel.org
Subject: Re: mmotm 2011-08-24-14-08 uploaded

On Thu, 25 Aug 2011 17:45:38 +0200 Johannes Weiner wrote:

> On Fri, Aug 26, 2011 at 01:09:38AM +1000, Stephen Rothwell wrote:
> > Hi,
> > 
> > On Thu, 25 Aug 2011 16:07:01 +0200 Michal Hocko <mhocko@...e.cz> wrote:
> > >
> > > On Thu 25-08-11 15:51:03, Michal Hocko wrote:
> > > > 
> > > > On Wed 24-08-11 14:09:05, Andrew Morton wrote:
> > > > > The mm-of-the-moment snapshot 2011-08-24-14-08 has been uploaded to
> > > > > 
> > > > >    http://userweb.kernel.org/~akpm/mmotm/
> > > > 
> > > > I have just downloaded your tree and cannot quilt it up. I am getting:
> > > > [...]
> > > > patching file tools/power/cpupower/debug/x86_64/centrino-decode.c
> > > > Hunk #1 FAILED at 1.
> > > > File tools/power/cpupower/debug/x86_64/centrino-decode.c is not empty after patch, as expected
> > > > 1 out of 1 hunk FAILED -- rejects in file tools/power/cpupower/debug/x86_64/centrino-decode.c
> > > > patching file tools/power/cpupower/debug/x86_64/powernow-k8-decode.c
> > > > Hunk #1 FAILED at 1.
> > > > File tools/power/cpupower/debug/x86_64/powernow-k8-decode.c is not empty after patch, as expected
> > > > 1 out of 1 hunk FAILED -- rejects in file tools/power/cpupower/debug/x86_64/powernow-k8-decode.c
> > > > [...]
> > > > patching file virt/kvm/iommu.c
> > > > Patch linux-next.patch does not apply (enforce with -f)
> > > > 
> > > > Is this a patch (I am using 2.6.1) issue? The failing hunk looks as
> > > > follows:
> > > > --- a/tools/power/cpupower/debug/x86_64/centrino-decode.c
> > > > +++ /dev/null
> > > > @@ -1 +0,0 @@
> > > > -../i386/centrino-decode.c
> > > > \ No newline at end of file
> > > 
> > > Isn't this just a special form of git (clever) diff to spare some lines
> > > when the file deleted? Or is the patch simply corrupted?
> > > Anyway, my patch doesn't cope with that. Any hint what to do about it?
> > 
> > Those files were symlinks and were removed by a commit in linux-next.
> > diff/patch does not cope with that.
> 
> You can probably replace `patch' in your $PATH by a wrapper that uses
> git-apply, which can deal with them.
> 
> Or you could use git-quiltimport, which uses git-apply, to prepare the
> -mmotm base tree in git, on top of which you can continue to work with
> quilt.
> 
> I do this with a cron-job automatically, you can find the result here:
> 
>     http://git.kernel.org/?p=linux/kernel/git/hannes/linux-mmotm.git;a=summary
> 
> If you want to do it manually, there is sometimes confusing binary
> file patch sections in -mmotm, which in turn git-apply can not deal
> with, so I use the following uncrapdiff.awk filter on the patches
> before import.


I thought that I recently saw a reference to an unreleased version of quilt
that handles git symlinks.  Was I dreaming?
or where is it?

Thanks.

> ---
> 
> # Filter out sections that feature an index line but
> # no real diff part that would start with '--- file'
> 
> {
> 	if (HEADER ~ /^diff --git /) {
> 		if ($0 ~ /^index /) {
> 			INDEX=$0
> 		} else if ($0 ~ /^diff --git /) {
> 			print(HEADER)
> 			HEADER=$0
> 		} else if (INDEX ~ /^index /) {
> 			if ($0 ~ /^--- /) {
> 				print(HEADER)
> 				print(INDEX)
> 				print($0)
> 			}
> 			HEADER=""
> 			INDEX=""
> 		} else {
> 			HEADER=HEADER "\n" $0
> 		}
> 	} else if ($0 ~ /^diff --git /) {
> 		HEADER=$0
> 	} else {
> 		print($0)
> 	}
> }
> 
> ---

---
~Randy
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