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authorNathan Chancellor <nathan@kernel.org>2023-04-27 22:34:53 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2023-05-12 09:20:18 +0300
commit2b694fc96fe33a7c042e3a142d27d945c8c668b0 (patch)
treee80ff742396c4b3837b40458f69b20da3a9afd62 /arch
parent66b2ca086210732954a7790d63d35542936fc664 (diff)
downloadlinux-2b694fc96fe33a7c042e3a142d27d945c8c668b0.tar.xz
powerpc/boot: Disable power10 features after BOOTAFLAGS assignment
When building the boot wrapper assembly files with clang after commit 648a1783fe25 ("powerpc/boot: Fix boot wrapper code generation with CONFIG_POWER10_CPU"), the following warnings appear for each file built: '-prefixed' is not a recognized feature for this target (ignoring feature) '-pcrel' is not a recognized feature for this target (ignoring feature) While it is questionable whether or not LLVM should be emitting a warning when passed negative versions of code generation flags when building assembly files (since it does not emit a warning for the altivec and vsx flags), it is easy enough to work around this by just moving the disabled flags to BOOTCFLAGS after the assignment of BOOTAFLAGS, so that they are not added when building assembly files. Do so to silence the warnings. Fixes: 648a1783fe25 ("powerpc/boot: Fix boot wrapper code generation with CONFIG_POWER10_CPU") Link: https://github.com/ClangBuiltLinux/linux/issues/1839 Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230427-remove-power10-args-from-boot-aflags-clang-v1-1-9107f7c943bc@kernel.org
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/boot/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 85cde5bf04b7..771b79423bbc 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -34,8 +34,6 @@ endif
BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -O2 -msoft-float -mno-altivec -mno-vsx \
- $(call cc-option,-mno-prefixed) $(call cc-option,-mno-pcrel) \
- $(call cc-option,-mno-mma) \
$(call cc-option,-mno-spe) $(call cc-option,-mspe=no) \
-pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
$(LINUXINCLUDE)
@@ -71,6 +69,10 @@ BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -nostdinc
BOOTARFLAGS := -crD
+BOOTCFLAGS += $(call cc-option,-mno-prefixed) \
+ $(call cc-option,-mno-pcrel) \
+ $(call cc-option,-mno-mma)
+
ifdef CONFIG_CC_IS_CLANG
BOOTCFLAGS += $(CLANG_FLAGS)
BOOTAFLAGS += $(CLANG_FLAGS)