linux-kernel - [PATCH 3.16.y-ckt 159/180] um: Fix build error and kconfig for i386

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Message-Id: <1454538786-12215-160-git-send-email-luis.henriques@canonical.com>
Date:	Wed,  3 Feb 2016 22:32:45 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Mickaël Salaün <mic@...ikod.net>,
	Jeff Dike <jdike@...toit.com>,
	Richard Weinberger <richard@....at>,
	Josh Triplett <josh@...htriplett.org>,
	"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
	Michal Marek <mmarek@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 159/180] um: Fix build error and kconfig for i386

3.16.7-ckt24 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= <mic@...ikod.net>

commit 42d91f612c879627c925d3779c36877cd440f9f9 upstream.

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: Mickaël Salaün <mic@...ikod.net>
Cc: Jeff Dike <jdike@...toit.com>
Cc: Richard Weinberger <richard@....at>
Cc: Josh Triplett <josh@...htriplett.org>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Michal Marek <mmarek@...e.cz>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Richard Weinberger <richard@....at>
Reviewed-by: Josh Triplett <josh@...htriplett.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 arch/x86/um/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index eafa324eb7a5..7a97752c6372 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -17,7 +17,7 @@ obj-y = bug.o bugs_$(BITS).o delay.o fault.o ksyms.o ldt.o \
 ifeq ($(CONFIG_X86_32),y)
 
 obj-y += checksum_32.o
-obj-$(CONFIG_BINFMT_ELF) += elfcore.o
+obj-$(CONFIG_ELF_CORE) += elfcore.o
 
 subarch-y = ../lib/string_32.o ../lib/atomic64_32.o ../lib/atomic64_cx8_32.o
 subarch-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += ../lib/rwsem.o