linux-kernel - [PATCH v2] x86/boot: Don't add the EFI stub to targets, again

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Message-ID: <xm267ceukksz.fsf@bsegall.svl.corp.google.com>
Date: Wed, 12 Jun 2024 12:44:44 -0700
From: Benjamin Segall <bsegall@...gle.com>
To: linux-efi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>, Arvind
 Sankar <nivedita@...m.mit.edu>, Thomas Gleixner <tglx@...utronix.de>, Ingo
 Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
 <dave.hansen@...ux.intel.com>
Subject: [PATCH v2] x86/boot: Don't add the EFI stub to targets, again

This is a re-commit of the commit da05b143a308 ("x86/boot: Don't add the
EFI stub to targets") after the tagged patch incorrectly reverted it.

To summarize: vmlinux-objs-y is added to targets, with an assumption
that they are all relative to $(obj); adding a $(objtree)/drivers/...
path causes the build to incorrectly create a useless
arch/x86/boot/compressed/drivers/... directory tree.

Fix this just by using a different make variable for the EFI stub.

Fixes: cb8bda8ad443 ("x86/boot/compressed: Rename efi_thunk_64.S to efi-mixed.S")
Signed-off-by: Ben Segall <bsegall@...gle.com>
Reviewed-by: Ard Biesheuvel <ardb@...nel.org>
Cc: stable@...r.kernel.org # v6.1+
---
 arch/x86/boot/compressed/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 243ee86cb1b1..f2051644de94 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -103,13 +103,13 @@ vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
 vmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(obj)/tdx.o $(obj)/tdcall.o $(obj)/tdx-shared.o
 vmlinux-objs-$(CONFIG_UNACCEPTED_MEMORY) += $(obj)/mem.o
 
 vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o
 vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_mixed.o
-vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
+vmlinux-libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
 
-$(obj)/vmlinux: $(vmlinux-objs-y) FORCE
+$(obj)/vmlinux: $(vmlinux-objs-y) $(vmlinux-libs-y) FORCE
 	$(call if_changed,ld)
 
 OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
 $(obj)/vmlinux.bin: vmlinux FORCE
 	$(call if_changed,objcopy)
-- 
2.45.2.505.gda0bf45e8d-goog