From: Yury Norov <ynorov@caviumnetworks.com>
To: <arnd@arndb.de>, <catalin.marinas@arm.com>,
        <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
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CC: <schwidefsky@de.ibm.com>, <heiko.carstens@de.ibm.com>,
        <ynorov@caviumnetworks.com>, <pinskia@gmail.com>, <broonie@kernel.org>,
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        <maxim.kuvyrkov@linaro.org>, <davem@davemloft.net>,
        <zhouchengming1@huawei.com>, <cmetcalf@ezchip.com>,
        Andrew Pinski <apinski@cavium.com>,
        Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
Subject: [PATCH 04/18] arm64: ensure the kernel is compiled for LP64
Date: Fri, 21 Oct 2016 23:33:03 +0300
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From: Andrew Pinski <apinski@cavium.com>

The kernel needs to be compiled as a LP64 binary for ARM64, even when
using a compiler that defaults to code-generation for the ILP32 ABI.
Consequently, we need to explicitly pass '-mabi=lp64' (supported on
gcc-4.9 and newer).

Signed-off-by: Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Reviewed-by: David Daney <ddaney@caviumnetworks.com>
---
 arch/arm64/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index ab51aed..80eb000 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -42,15 +42,20 @@ KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
 KBUILD_AFLAGS	+= $(lseinstr)
 
+KBUILD_CFLAGS	+= $(call cc-option,-mabi=lp64)
+KBUILD_AFLAGS	+= $(call cc-option,-mabi=lp64)
+
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 AS		+= -EB
 LD		+= -EB
+LDFLAGS		+= -maarch64linuxb
 UTS_MACHINE	:= aarch64_be
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 AS		+= -EL
 LD		+= -EL
+LDFLAGS		+= -maarch64linux
 UTS_MACHINE	:= aarch64
 endif
 
-- 
2.7.4