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authorMasahiro Yamada <masahiroy@kernel.org>2021-08-01 14:35:25 +0900
committerWill Deacon <will@kernel.org>2021-08-03 10:35:58 +0100
commit64ee84c75b5f75132eec97f2c7a201a056d53698 (patch)
tree4a37becebd140f7cf61fcd09295a5a94d5f4ee02 /arch/arm64/Makefile
parente30e8d46cf605d216a799a28c77b8a41c328613a (diff)
arm64: move warning about toolchains to archprepare
Commit 987fdfec2410 ("arm64: move --fix-cortex-a53-843419 linker test to Kconfig") fixed the false-positive warning in the installation step. Yet, there are some cases where this false-positive is shown. For example, you can see it when you cross 987fdfec2410 during git-bisect. $ git checkout 987fdfec2410^ [ snip ] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig all [ snip ] $ git checkout v5.13 [ snip] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig all [ snip ] arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum In the stale include/config/auto.config, CONFIG_ARM64_ERRATUM_843419=y is set without CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419, so the warning is displayed while parsing the Makefiles. Make will restart with the updated include/config/auto.config, hence CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419 will be set eventually, but this warning is a surprise for users. Commit 25896d073d8a ("x86/build: Fix compiler support check for CONFIG_RETPOLINE") addressed a similar issue. Move $(warning ...) out of the parse stage of Makefiles. The same applies to CONFIG_ARM64_USE_LSE_ATOMICS. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Link: https://lore.kernel.org/r/20210801053525.105235-1-masahiroy@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/Makefile')
-rw-r--r--arch/arm64/Makefile21
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 7bc37d0a1b68..7b668db43261 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -21,19 +21,11 @@ LDFLAGS_vmlinux += -shared -Bsymbolic -z notext \
endif
ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
- 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
+ ifeq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
LDFLAGS_vmlinux += --fix-cortex-a53-843419
endif
endif
-ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y)
- ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y)
-$(warning LSE atomics not supported by binutils)
- endif
-endif
-
cc_has_k_constraint := $(call try-run,echo \
'int main(void) { \
asm volatile("and w0, w0, %w0" :: "K" (4294967295)); \
@@ -176,6 +168,17 @@ vdso_install:
archprepare:
$(Q)$(MAKE) $(build)=arch/arm64/tools kapi
+ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
+ ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
+ @echo "warning: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum" >&2
+ endif
+endif
+ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS),y)
+ ifneq ($(CONFIG_ARM64_LSE_ATOMICS),y)
+ @echo "warning: LSE atomics not supported by binutils" >&2
+ endif
+endif
+
# We use MRPROPER_FILES and CLEAN_FILES now
archclean: