linux-kernel - Re: [RESEND PATCH] tools/bootconfig: Fix a compilation issue with missing variable

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Date:   Wed, 8 Sep 2021 09:41:45 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Punit Agrawal <punitagrawal@...il.com>, mhiramat@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] tools/bootconfig: Fix a compilation issue with
 missing variable

On Tue, 7 Sep 2021 20:24:00 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Wed,  8 Sep 2021 08:07:10 +0900
> Punit Agrawal <punitagrawal@...il.com> wrote:
> 
> > While looking to build bootconfig tool in order to debug a kernel boot
> > time issue I noticed that tool fails to compile. The broken changes
> > were introduced by commit e5efaeb8a8f5 ("bootconfig: Support mixing a
> > value and subkeys under a key").
> > 
> > Fix the compile issue by introducing a "ret" variable to track the
> > return value from xbc_node_compose_key().
> > 
> > Fixes: e5efaeb8a8f5 ("bootconfig: Support mixing a value and subkeys under a key")
> > Signed-off-by: Punit Agrawal <punitagrawal@...il.com>
> > Cc: Masami Hiramatsu <mhiramat@...nel.org>
> > Cc: Steven Rostedt <rostedt@...dmis.org>
> > ---
> > 
> > (Apologies for the resend. I fat-fingered the email address for lkml)
> 
> And I'm resending my reply to have it recorded as well.
> 
> > 
> > Hi Masami,
> > 
> > I am not sure what went wrong but the patch in the lore link[0]
> > doesn't match the end result (bad merge?). You may want to recheck the
> > other changes to make sure it all looks sane.
> 
> 
> Thanks for reporting this. This is strange. Especially since it's all
> scripts that are used to import these.
> 
> I do remember doing a rebase to fix some issues in another unrelated
> patch. I wonder if I accidentally messed this up during that rebase :-/
> 
> I'll have to investigate this.
> 
> I'll checkout the tree before the affected patch, and reapply the
> changes from my scripts to see if it wasn't my script that broke.
> 
> Again, thanks for reporting this!

Hi Steve,

I've investigated that why this happens here.

https://lore.kernel.org/all/20210831033256.5973-1-jcfaracco@gmail.com/T/#m52f43f6deb874ee726b10ce25ba53e44697a275a

This seems a timing issue. I acked a "simplify" patch April, and
the I wrongly worked on the linus tree for "mixing a value and subkeys"
and send it to you June. At last, those 2 conflicted on your branch and
your merge script might just merge it.
Actually, what Punit and Julio did is reverting 

commit 30d103f2d460 ("tools/bootconfig: Simplify expression")

Thank you,

-- 
Masami Hiramatsu <mhiramat@...nel.org>