linux-kernel - Re: powerpc allyesconfig / allmodconfig linux-next next-20160729

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Message-ID: <20160805184108.7fc3dbd0@roar.ozlabs.ibm.com>
Date:	Fri, 5 Aug 2016 18:41:08 +1000
From:	Nicholas Piggin <npiggin@...il.com>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Luis R. Rodriguez" <mcgrof@...nel.org>,
	linux-next@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -
 next-20160729 build failures

On Thu, 4 Aug 2016 12:06:41 -0500
Segher Boessenkool <segher@...nel.crashing.org> wrote:

> On Thu, Aug 04, 2016 at 06:10:57PM +0200, Arnd Bergmann wrote:
> > On Thursday, August 4, 2016 9:47:13 PM CEST Nicholas Piggin wrote:
> >   
> > > +	__used							\
> > > +	__attribute__((section("___kentry" "+" #sym ",\"a\",@note #"), used)) \  
> > 
> > 
> > I've just started testing this, but the first problem I ran into
> > is that @ and # are special characters that have an architecture
> > specific meaning to the assembler. On ARM, you need "%note @" instead
> > of "@note #".  
> 
> That comment trick (I still feel guilty about it) causes more problems
> than it solves.  Please don't try to use it :-)

Yeah that's a funny hack. I don't think it's required though, but I'm just
running through some more tests.

I think I found an improvement with the thin archives as well -- we were
still building symbol table after removing the s option (that only avoids
index). "S" is required to not build symbol table.

I'll send out an RFC on a slightly more polished patch series shortly.

Thanks,
Nick