arm64: move --fix-cortex-a53-843419 linker test to Kconfig

Since commit 805b2e1d427a ("kbuild: include Makefile.compiler only when
compiler is needed"), "make ARCH=arm64 (modules_)install" shows a false
positive warning.

Move the ld-option test to Kconfig, so that the result can be stored in
the .config file, avoiding multiple-time evaluations in the build and
installation time.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5656e7a..4a33428 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -521,6 +521,9 @@ config ARM64_ERRATUM_843419
 
          If unsure, say Y.
 
+config ARM64_LD_HAS_FIX_ERRATUM_843419
+       def_bool $(ld-option,--fix-cortex-a53-843419)
+
 config ARM64_ERRATUM_1024718
        bool "Cortex-A55: 1024718: Update of DBM/AP bits without break before make might result in incorrect update"
        default y

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 5b84aec..7ef4447 100644 (file)
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -21,7 +21,7 @@ LDFLAGS_vmlinux               += -shared -Bsymbolic -z notext \
 endif
 
 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
-  ifeq ($(call ld-option, --fix-cortex-a53-843419),)
+  ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
 $(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
   else
 LDFLAGS_vmlinux        += --fix-cortex-a53-843419