| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 050/342] arm64: errata: Add -mpc-relative-literal-loads to build flags | Date | Tue, 01 Mar 2016 23:54:00 +0000 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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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.
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 <ard.biesheuvel@linaro.org> Suggested-by: Christophe Lyon <christophe.lyon@linaro.org> Signed-off-by: Dann Frazier <dann.frazier@canonical.com> [will: backport to 4.4-stable] Signed-off-by: Will Deacon <will.deacon@arm.com> 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)
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