linux-kernel - Re: Using vanilla kernels headers to do backport testing -- issues with memcpy()

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Message-ID: <CAB=NE6V7Tx1ioDafPmOprwzd0Q61dDe8XK5gBghXHVROXOBA=Q@mail.gmail.com>
Date:	Wed, 8 Aug 2012 20:30:33 -0700
From:	"Luis R. Rodriguez" <mcgrof@...jolero.org>
To:	Ozan Çağlayan <ozancag@...il.com>
Cc:	Ubuntu Kernel Team <kernel-team@...ts.ubuntu.com>,
	linux-kernel@...r.kernel.org,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Hauke Mehrtens <hauke@...ke-m.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: Using vanilla kernels headers to do backport testing -- issues
 with memcpy()

On Wed, Aug 8, 2012 at 5:43 AM, Ozan Çağlayan <ozancag@...il.com> wrote:
> On Tue, Aug 7, 2012 at 10:28 PM, Luis R. Rodriguez <mcgrof@...jolero.org> wrote:

>> mcgrof@...banzo ~/compat (git::master)$ objdump -T
>> /home/mcgrof/compat-ksrc/lib/modules/3.4.4-030404-generic/build/scripts/genksyms/genksyms

<-- snip -->

>> Bleh:
>>
>> 0000000000000000      DF *UND*  0000000000000000  GLIBC_2.14  memcpy

<-- snip -->

> Can't we just rebuild genksyms in compat? I already have glibc 2.15 on
> my system so I can't test this but normally this should adapt to the
> build environment as it rebuilds and relinks the binary.

Indeed! Implemented and pushed upstream:

https://github.com/mcgrof/compat/commit/42faf2dc8d8bbbdc5b8913183fcd021a27e953c9

So if you run into this issue all you have to do now is run:

./bin/get-compat-kernels -r

New users of the script will automatically have this run after it
downloads and installs the kernel headers.

Case closed, thanks :)

  Luis
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