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authordann frazier <dann.frazier@canonical.com>2016-01-25 16:52:16 -0700
committerWill Deacon <will.deacon@arm.com>2016-01-26 11:17:23 +0000
commit67dfa1751ce71e629aad7c438e1678ad41054677 (patch)
treee2b5dc99b5193a83210e8897624dd9bda5ec7e76
parentEliminate the .eh_frame sections from the aarch64 vmlinux and kernel modules (diff)
downloadlinux-dev-67dfa1751ce71e629aad7c438e1678ad41054677.tar.xz
linux-dev-67dfa1751ce71e629aad7c438e1678ad41054677.zip
arm64: errata: Add -mpc-relative-literal-loads to build flags
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> Signed-off-by: Will Deacon <will.deacon@arm.com>
-rw-r--r--arch/arm64/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 094a137f6083..307237cfe728 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -28,6 +28,7 @@ endif
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
KBUILD_AFLAGS += $(lseinstr)
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)