From mboxrd@z Thu Jan 1 00:00:00 1970 From: dann.frazier@canonical.com (dann frazier) Date: Tue, 26 Jan 2016 13:11:24 -0700 Subject: [PATCH v3] arm64: errata: Add -mpc-relative-literal-loads to build flags Message-ID: <20160126201124.GA5614@fluid.dannf> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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: [ 2.156817] module libahci: unsupported RELA relocation: 275 v2: Unconditionally use flag for both kernel and modules, as Ard notes we have no requirement for supporting literals >1 MB away. v3: Drop reference to -mfix-cortex-a53-843419. Cc: stable at vger.kernel.org Fixes: df057cc7b4fa ("arm64: errata: add module build workaround for erratum #843419") BugLink: http://bugs.launchpad.net/bugs/1533009 Suggested-by: Christophe Lyon Acked-by: Ard Biesheuvel Signed-off-by: dann frazier --- arch/arm64/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index cd822d8..b6c90e5 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -27,6 +27,7 @@ $(warning LSE atomics not supported by binutils) 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) -- 2.7.0