Patch "arm64: errata: Add -mpc-relative-literal-loads to build flags" has been added to the 4.4-stable tree

Patch "arm64: errata: Add -mpc-relative-literal-loads to build flags" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    arm64: errata: Add -mpc-relative-literal-loads to build flags

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-errata-add-mpc-relative-literal-loads-to-build-flags.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 67dfa1751ce71e629aad7c438e1678ad41054677 Mon Sep 17 00:00:00 2001
From: dann frazier <dann.frazier@canonical.com>
Date: Mon, 25 Jan 2016 16:52:16 -0700
Subject: arm64: errata: Add -mpc-relative-literal-loads to build flags

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)


Patches currently in stable-queue which might be from dann.frazier@canonical.com are

queue-4.4/arm64-errata-add-mpc-relative-literal-loads-to-build-flags.patch