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| author | Nathan Chancellor <nathan@kernel.org> | 2025-08-14 18:31:39 -0700 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-08-16 23:50:16 +0200 |
| commit | 487fe3a936b0b84ef09fa324b4c01d059886f951 (patch) | |
| tree | a591dcccb5d06257ae029d091b15fda9be530d58 | |
| parent | d87208128a3330c0eab18301ab39bdb419647730 (diff) | |
| download | linux-487fe3a936b0b84ef09fa324b4c01d059886f951.tar.gz linux-487fe3a936b0b84ef09fa324b4c01d059886f951.zip | |
x86/build: Clean up stack alignment flags in CC_FLAGS_FPU
The minimum supported version of GCC to build the x86 kernel was bumped
to GCC 8.1 in
a3e8fe814ad1 ("x86/build: Raise the minimum GCC version to 8.1").
Prior to GCC 7.1, '-mpreferred-stack-boundary=3' was not allowed with
'-msse', so areas of the kernel that needed floating point had a
different alignment. Now that GCC > 7.1 is mandatory, there is no need
to have a different value of '-mpreferred-stack-boundary' from the rest
of the kernel, so remove this handling from CC_FLAGS_FPU.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=34fac449e121be97dd073c5428cc855367b2872c
Link: https://lore.kernel.org/20250814-x86-min-ver-cleanups-v1-3-ff7f19457523@kernel.org
| -rw-r--r-- | arch/x86/Makefile | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index f0aa58d2ec17..0c82a610fb54 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -84,19 +84,7 @@ KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-av # CC_FLAGS_FPU := -msse -msse2 ifdef CONFIG_CC_IS_GCC -# Stack alignment mismatch, proceed with caution. -# GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3 -# (8B stack alignment). -# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 -# -# The "-msse" in the first argument is there so that the -# -mpreferred-stack-boundary=3 build error: -# -# -mpreferred-stack-boundary=3 is not between 4 and 12 -# -# can be triggered. Otherwise gcc doesn't complain. CC_FLAGS_FPU += -mhard-float -CC_FLAGS_FPU += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4) endif ifeq ($(CONFIG_X86_KERNEL_IBT),y) |