linux-kernel - Re: [PATCH 00/29] objtool sync up for the stable 4.9.y tree

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Date:   Mon, 4 Jun 2018 09:59:02 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Arnd Bergmann <arnd@...db.de>, David Ahern <dsahern@...il.com>,
        David Laight <David.Laight@...LAB.COM>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
        Jiri Slaby <jslaby@...e.cz>, Joe Perches <joe@...ches.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Konstantin Khlebnikov <koct9i@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wang Nan <wangnan0@...wei.com>,
        damian <damian.tometzki@...oud.com>
Subject: Re: [PATCH 00/29] objtool sync up for the stable 4.9.y tree

On Sun, Jun 03, 2018 at 02:26:23PM +0200, Greg Kroah-Hartman wrote:
> There are pros and cons of dealing with tools in the kernel directory.
> The pros are the fact that development happens fast, and new features
> can be added to the kernel and the tools at the same times.  The cons
> are when dealing with backported kernel patches, it can be necessary to
> backport parts of the tool changes as well.
> 
> For 4.9.y so far, we have backported individual patches.  That quickly
> breaks down when there are minor differences between how backports were
> handled, so grabbing 40+ patch long series can be difficult, not
> impossible, but really frustrating to attempt.
> 
> To help mitigate this mess, this patch series works to sync up the
> objtool code with the version that is currently in 4.14.47.  This
> required a number of objtool old patches to be backported, a single big
> "sync the world" patch, and a lot of include file updates to get
> everything all working properly as well as some minor fixes for build
> warnings.
> 
> And at the end of this series, is a set of backported objtool patches
> for gcc-8 that was the main reason this whole patch series was created.
> They applied just fine, being the identical version that goes into the
> 4.14.y stable tree, so it feels like the backport was successful.
> 
> This has survivied my limited testing, and as the codebase is identical
> to 4.14.47, I'm pretty comfortable dropping this big change in here in
> 4.9.y.  Hopefully all goes well...
> 
> If anyone has any objections to this patch series, or finds anything I
> messed up on, please let me know.

Thanks Greg.  Looks good to me.

Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>

-- 
Josh