Re: Patch "powerpc: Simplify module TOC handling" has been added to the 4.4-stable tree

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On Wed, 2016-03-09 at 10:47 +1100, Michael Ellerman wrote:
> On Tue, 2016-03-08 at 20:53 +0000, Ben Hutchings wrote:
> > 
> > On Wed, 2016-02-24 at 15:51 +1100, Michael Ellerman wrote:
> > > 
> > > On Tue, 2016-02-23 at 19:24 -0800, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> > > > 
> > > > 
> > > > This is a note to let you know that I've just added the patch titled
> > > > 
> > > >     powerpc: Simplify module TOC handling
> > > > 
> > > > to the 4.4-stable tree which can be found at:
> > > >     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> > > > 
> > > > The filename of the patch is:
> > > >      powerpc-simplify-module-toc-handling.patch
> > > > and it can be found in the queue-4.4 subdirectory.
> > > > 
> > > > If you, or anyone else, feels it should not be added to the stable tree,
> > > > please let <stable@xxxxxxxxxxxxxxx> know about it.
> > > > 
> > > > 
> > > > From c153693d7eb9eeb28478aa2deaaf0b4e7b5ff5e9 Mon Sep 17 00:00:00 2001
> > > > From: Alan Modra <amodra@xxxxxxxxx>
> > > > Date: Fri, 15 Jan 2016 20:52:22 +1100
> > > > Subject: powerpc: Simplify module TOC handling
> > > > 
> > > > From: Alan Modra <amodra@xxxxxxxxx>
> > > > 
> > > > commit c153693d7eb9eeb28478aa2deaaf0b4e7b5ff5e9 upstream.
> > > Hi Greg,
> > > 
> > > Please drop this commit, it requires a corresponding change to depmod which we
> > > need to get accepted first.
> > > 
> > > Sorry for the churn.
> > Is that specifically for ppc64el?  Module loading has been completely
> > broken in powerpc 64-bit kernels in Debian unstable since we got
> > binutils 2.26 and these two patches certainly fixed the big-endian case
> > without any need for a new kmod.
> Yes, it's only required on LE.
> 
> I'll have to defer to Alan on the details, but on BE we don't see those
> relocations against .TOC. and so none of this matters.

The following patch "powerpc: Fix dedotify for binutils >= 2.26"
certainly is needed for BE, so someone should send Greg a version that
applies on top of 4.4 without the TOC change.  (It could even be me,
but my patch/compile/test cycle on powerpc is rather slow.)

Ben.

-- 
Ben Hutchings
When in doubt, use brute force. - Ken Thompson

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