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x86/cpu: Drop unused Kconfig symbol X86_P6_NOP

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This symbol was removed in early 2025 but 2 dangling references to it
were missed. Delete them now.

It should be safe to drop the -mtune=generic32 option since gcc 4.3
and later do not cause the problem (see 28f7e66fc1 ("x86: prevent
binutils from being "smart" and generating NOPLs for us")). Also, Arnd
confirmed this with gcc-8 and gcc-15 (see Link:).

Fixes: f388f60ca9 ("x86/cpu: Drop configuration options for early 64-bit CPUs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://patch.msgid.link/20260106014708.991447-1-rdunlap@infradead.org
Link: https://lore.kernel.org/all/c0f0814a-8333-49e1-8e50-740e4c88d94b@app.fastmail.com/
This commit is contained in:
Randy Dunlap 2026-01-05 17:47:08 -08:00 • committed by Dave Hansen
parent 0bc03750de
commit 18fe1f5862
2 changed files with 1 additions and 7 deletions
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2
arch/x86/Kconfig.cpufeatures
View file

@ -38,7 +38,7 @@ config X86_REQUIRED_FEATURE_ALWAYS
config X86_REQUIRED_FEATURE_NOPL
def_bool y
depends on X86_64 || X86_P6_NOP
depends on X86_64
config X86_REQUIRED_FEATURE_CX8
def_bool y

6
arch/x86/Makefile_32.cpu
View file

@ -42,9 +42,3 @@ cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx)
# add at the end to overwrite eventual tuning options from earlier
# cpu entries
cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686))
# Bug fix for binutils: this option is required in order to keep
# binutils from generating NOPL instructions against our will.
ifneq ($(CONFIG_X86_P6_NOP),y)
cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,)
endif