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[12/15] arm64: explicitly pass --no-fix-cortex-a53-843419 to GNU gold

Message ID 20171103171203.107569-16-samitolvanen@google.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sami Tolvanen Nov. 3, 2017, 5:11 p.m. UTC 
Some versions of GNU gold are known to produce broken code with
--fix-cortex-a53-843419 as explained in this bug:

  https://sourceware.org/bugzilla/show_bug.cgi?id=21491

If ARM64_ERRATUM_843419 is disabled and we're using GNU gold, pass
--no-fix-cortex-a53-843419 to the linker to ensure the erratum fix is not
used even if the linker is configured to enable it by default.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
 arch/arm64/Makefile | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index c16bd1ab37f8..0c1fb297c98e 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -26,6 +26,11 @@  LDFLAGS_vmlinux	+= --fix-cortex-a53-843419
   endif
 endif
 
+ifeq ($(CONFIG_ARM64_ERRATUM_843419),)
+# https://sourceware.org/bugzilla/show_bug.cgi?id=21491
+LDFLAGS_GOLD	+= --no-fix-cortex-a53-843419
+endif
+
 KBUILD_DEFCONFIG := defconfig
 
 # Check for binutils support for specific extensions