Commit 987fdfec authored Mar 24, 2021 by Masahiro Yamada

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



Since commit 805b2e1d ("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>

parent 2e988157

arch/arm64/Kconfig

+3 −0

Original line number	Diff line number	Diff line
		@@ -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

arch/arm64/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -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