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| Started by | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| First post | 2016-02-05 00:00 +0100 |
| Last post | 2016-02-05 00:00 +0100 |
| Articles | 1 — 1 participant |
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[PATCH 4.2.y-ckt 41/64] arm64: errata: Add -mpc-relative-literal-loads to build flags Kamal Mostafa <kamal@canonical.com> - 2016-02-05 00:00 +0100
| From | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| Date | 2016-02-05 00:00 +0100 |
| Subject | [PATCH 4.2.y-ckt 41/64] arm64: errata: Add -mpc-relative-literal-loads to build flags |
| Message-ID | <qYB2B-8qn-81@gated-at.bofh.it> |
4.2.8-ckt4 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: dann frazier <dann.frazier@canonical.com>
commit 67dfa1751ce71e629aad7c438e1678ad41054677 upstream.
GCC6 (and Linaro's 2015.12 snapshot of GCC5) has a new default that uses
adrp/ldr or adrp/add to address literal pools. When CONFIG_ARM64_ERRATUM_843419
is enabled, modules built with this toolchain fail to load:
module libahci: unsupported RELA relocation: 275
This patch fixes the problem by passing '-mpc-relative-literal-loads'
to the compiler.
Fixes: df057cc7b4fa ("arm64: errata: add module build workaround for erratum #843419")
BugLink: http://bugs.launchpad.net/bugs/1533009
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Suggested-by: Christophe Lyon <christophe.lyon@linaro.org>
Signed-off-by: Dann Frazier <dann.frazier@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
arch/arm64/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 3258174..d7e808f 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -18,6 +18,7 @@ GZFLAGS :=-9
KBUILD_DEFCONFIG := defconfig
KBUILD_CFLAGS += -mgeneral-regs-only
+KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
KBUILD_CPPFLAGS += -mbig-endian
AS += -EB
--
1.9.1
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