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Date: Fri, 25 Dec 2015 19:45:41 +0100
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Sender: linux-kernel-owner@vger.kernel.org
Subject: Re: [PATCH v3] um: Fix build error and kconfig for i386
To: Josh Triplett <josh@joshtriplett.org>
Cc: linux-kernel@vger.kernel.org, Jeff Dike <jdike@addtoit.com>, Richard Weinberger <richard@nod.at>, user-mode-linux-devel@lists.sourceforge.net, "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>, Michal Marek <mmarek@suse.cz>, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, stable@vger.kernel.org
List-ID: <user-mode-linux-devel.lists.sourceforge.net>

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On 25/12/2015 02:34, Josh Triplett wrote:
> On Thu, Dec 24, 2015 at 01:12:11PM +0100, Micka=EBl Sala=FCn wrote:
>> Fix build error by generating elfcore.o only when ELF_CORE (depending =
on
>> COREDUMP) is selected:
>>
>> arch/x86/um/built-in.o: In function `elf_core_write_extra_phdrs':
>> (.text+0x3e62): undefined reference to `dump_emit'
>> arch/x86/um/built-in.o: In function `elf_core_write_extra_data':
>> (.text+0x3eef): undefined reference to `dump_emit'
>>
>> Fixes: 5d2acfc7b974 ("kconfig: make allnoconfig disable options behind=
 EMBEDDED and EXPERT")
>> Signed-off-by: Micka=EBl Sala=FCn <mic@digikod.net>
>> Cc: Jeff Dike <jdike@addtoit.com>
>> Cc: Richard Weinberger <richard@nod.at>
>> Cc: Josh Triplett <josh@joshtriplett.org>
>> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
>> Cc: Michal Marek <mmarek@suse.cz>
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Cc: Linus Torvalds <torvalds@linux-foundation.org>
>=20
> It looks like ELF_CORE depends on COREDUMP, but not on BINFMT_ELF.
> Should it?  What happens if you build this with ELF_CORE=3Dy and
> BINFMT_ELF=3Dn?  Does that configuration even make sense?

It build fine with ELF_CORE=3Dy and BINFMT_ELF=3Dn but does not seem usef=
ul. Nevertheless, it's the same for all architectures (cf. init/Kconfig):=
 ELF_CORE only depends on COREDUMP.

 Micka=EBl


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