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| author | Nathan Chancellor <nathan@kernel.org> | 2025-08-15 04:31:38 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-08-15 23:59:19 +0300 |
| commit | d87208128a3330c0eab18301ab39bdb419647730 (patch) | |
| tree | 272d44818917d76451aa7ef923e802c84dba747d | |
| parent | 5d6d30eca4dd1c9e8515a8d4b13106205d5c0ec4 (diff) | |
| download | linux-d87208128a3330c0eab18301ab39bdb419647730.tar.xz | |
x86/build: Remove cc-option from stack alignment flags
'-mpreferred-stack-boundary' (the GCC option) and '-mstack-alignment'
(the clang option) have been supported in their respective compilers for
some time, so it is unnecessary to check for support for them via
cc-option. '-mpreferred-stack-boundary=3' had a restriction on
'-mno-sse' until GCC 7.1 but that is irrelevant for most of the kernel,
which includes '-mno-sse'.
Move to simple Kconfig checks to avoid querying the compiler for the
flags that it supports.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250814-x86-min-ver-cleanups-v1-2-ff7f19457523@kernel.org
| -rw-r--r-- | arch/x86/Makefile | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index ed5657395d6a..f0aa58d2ec17 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -37,10 +37,11 @@ export RETPOLINE_VDSO_CFLAGS # For gcc stack alignment is specified with -mpreferred-stack-boundary, # clang has the option -mstack-alignment for that purpose. -ifneq ($(call cc-option, -mpreferred-stack-boundary=4),) +ifdef CONFIG_CC_IS_GCC cc_stack_align4 := -mpreferred-stack-boundary=2 cc_stack_align8 := -mpreferred-stack-boundary=3 -else ifneq ($(call cc-option, -mstack-alignment=16),) +endif +ifdef CONFIG_CC_IS_CLANG cc_stack_align4 := -mstack-alignment=4 cc_stack_align8 := -mstack-alignment=8 endif |