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x86/entry/vdso: Fix filtering of vdso compiler flags

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This fixes several typos in the filtering of compiler flags for vdso,
discovered by Chris Mason using an AI script:

1. "-fno-PIE" was written as "fno-PIE".
2. "CC_PLUGINS_FLAGS" was written as "CC_PLUGIN_FLAGS"

To the best of my knowledge, none of these actually had any real
impact on the build at this time but they are genuine bugs which could
break things at any point in the future.

Chris's script also found that "CONFIG_X86_USER_SHADOW_STACK" was
missing "CONFIG_", but it needs a different fix.

[ dhansen: remove CONFIG_X86_USER_SHADOW_STACK munging,
	   add mention in changelog. ]

Closes: https://lore.kernel.org/20260116035807.2307742-1-clm@meta.com
Fixes: 693c819fed ("x86/entry/vdso: Refactor the vdso build")
Reported-by: Chris Mason <clm@meta.com>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://patch.msgid.link/20260116204057.386268-3-hpa@zytor.com
This commit is contained in:
H. Peter Anvin 2026-01-16 12:40:55 -08:00 committed by Dave Hansen
parent b3683f3ba0
commit a48acbaf99
1 changed files with 2 additions and 2 deletions
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4
arch/x86/entry/vdso/common/Makefile.include
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@ -23,9 +23,9 @@ $(obj)/%.lds : KBUILD_CPPFLAGS += $(CPPFLAGS_VDSO_LDS)
#
flags-remove-y += \
-D__KERNEL__ -mcmodel=kernel -mregparm=3 \
-fno-pic -fno-PIC -fno-pie fno-PIE \
-fno-pic -fno-PIC -fno-pie -fno-PIE \
-mfentry -pg \
$(RANDSTRUCT_CFLAGS) $(GCC_PLUGIN_CFLAGS) $(KSTACK_ERASE_CFLAGS) \
$(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(KSTACK_ERASE_CFLAGS) \
$(RETPOLINE_CFLAGS) $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) \
$(PADDING_CFLAGS)