linux-kernel - Re: Linux 2.6.32.61 - x86/ptrace/gcc 4.7 build error

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Message-ID: <20130613175330.GC27760@1wt.eu>
Date:	Thu, 13 Jun 2013 19:53:30 +0200
From:	Willy Tarreau <w@....eu>
To:	Sven-Haegar Koch <haegar@...net.de>,
	Christoph Biedl <linux-kernel.bfrz@...chmal.in-ulm.de>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: Linux 2.6.32.61 - x86/ptrace/gcc 4.7 build error

Sven-Haegar, Christoph,

concerning the issue below, I could reproduce both Sven-Haegar's error (running
make headers_check with the patch applied) and Christoph's build error with gcc
4.7 on i686 without the patch.

I noticed that neither syscall_trace_enter() nor syscall_trace_leave() were
called from C code, all were from pure asm. So I simply reverted the first
patch then removed the two function prototypes and everything is OK for me
now using gcc 4.7, i686 and x86_64.

I'm attaching the two patches here to be appled on top of 2.6.32.61, I would
like it if you could try in your environment to confirm that they correctly
fix the issue.

Thanks,
Willy

--
On Mon, Jun 10, 2013 at 05:11:49PM +0200, Sven-Haegar Koch wrote:
> On Mon, 10 Jun 2013, Willy Tarreau wrote:
> 
> > Willy Tarreau (2):
> >       x86, ptrace: fix build breakage with gcc 4.7
> 
> This change breaks "make headers_install":
> 
>   CHECK   include (0 files)
>   CHECK   include/asm (54 files)
> /home/haegar/src/2.6.32/linux/usr/include/asm/ptrace.h:5: included file 'linux/linkage.h' is not exported
> make[3]: *** [/home/haegar/src/2.6.32/linux/usr/include/asm/.check] Error 123
> make[2]: *** [headers_check] Error 2
> make[1]: *** [deb-pkg] Error 2
> make: *** [deb-pkg] Error 2
> 
> c'ya
> sven-haegar
> 
> -- 
> Three may keep a secret, if two of them are dead.
> - Ben F.
> --
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View attachment "0001-Revert-x86-ptrace-fix-build-breakage-with-gcc-4.7.patch" of type "text/plain" (1583 bytes)

View attachment "0002-x86-ptrace-fix-build-breakage-with-gcc-4.7-second-tr.patch" of type "text/plain" (1164 bytes)