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

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Date:	Thu, 9 Aug 2012 09:27:29 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	"Luis R. Rodriguez" <mcgrof@...jolero.org>
Cc:	Ozan Çağlayan <ozancag@...il.com>,
	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 Thu, Aug 9, 2012 at 5:30 AM, Luis R. Rodriguez <mcgrof@...jolero.org> wrote:
> 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
>

I am not an English native but this sentence sounds a bit strange to
me ("used" followed by "require" and double "Linux"?).
I can imagine what you want to express but have no better wording right now.

180 +  echo -e "   This was added since kernels >= 3.4 used require"
181 +  echo -e "   a glibc >= 2.14 for memcpy(), and not all Linux"
182 +  echo -e "   Linux distributions have such glibc.

- Sedat -

> 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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