[BUG] v4.12 breaks pxa25x

[Nicholas Piggin]

On Wed, 26 Jul 2017 23:02:46 +0200
Robert Jarzmik <robert.jarzmik at free.fr> wrote:

> Nicholas Piggin <npiggin at gmail.com> writes:
> 
> > On Wed, 26 Jul 2017 12:41:39 +0100
> > Russell King - ARM Linux <linux at armlinux.org.uk> wrote:  
> >> Obviously, the mixing of .data.unlikely with the normal .data sections
> >> is undesirable - that looks like it's come from commit b67067f1176d
> >> ("kbuild: allow archs to select link dead code/data elimination") dated
> >> 2016, which according to git describe --contains was merged in v4.9-rc1.
> >> So it's unlikely to be directly caused by this, although this commit is
> >> implicated.
> >> 
> >> I wonder if Nick realised this side effect (that .data.unlikely is no
> >> longer grouped together) - maybe we need to rename .data.unlikely?
> >> (Adding Nick and Michal).  
> >
> > I did to some degree -- hence TEXT was not done that way -- but obviously
> > did not look closely enough.
> >
> > The right short term fix I think is to make those wildcards depend only on
> > CONFIG_LD_DEAD_CODE_DATA_ELIMINATION.
> >
> > One way to avoid clashes with compiler generated section names is to use
> > ".." as separators in our section names.
> >
> > Anyway I'll code up a fix for the linker script that we can get into 4.12,
> > thanks for pointing it out.  
> Ok, cool. I'd like to be copied to your patch so that I can test it please.

Hmm, I intended to cc you, but somehow failed that too. No wonder my
code has bugs :\

It's gone to linux-kbuild and linux-arm-kernel

http://marc.info/?l=linux-kbuild&m=150107320226315&q=raw

Or msg me privately I'll resend it to you.

Thanks,
Nick