[PATCH 4.4 050/342] arm64: errata: Add -mpc-relative-literal-loads to build flags
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-03-02 01:29:05
Also in:
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4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: dann frazier <redacted>
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.
Cc: stable@vger.kernel.org
Fixes: df057cc7b4fa ("arm64: errata: add module build workaround for erratum #843419")
BugLink: http://bugs.launchpad.net/bugs/1533009
Acked-by: Ard Biesheuvel <redacted>
Suggested-by: Christophe Lyon <redacted>
Signed-off-by: Dann Frazier <redacted>
[will: backport to 4.4-stable]
Signed-off-by: Will Deacon <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/Makefile | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile@@ -27,6 +27,7 @@ $(warning LSE atomics not supported by b endif KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) +KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) KBUILD_AFLAGS += $(lseinstr) ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)