linux-kernel - [tip: x86/vdso] x86/vdso: Simplify obj-y addition

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Date: Thu, 08 Feb 2024 13:04:40 -0000
From: "tip-bot2 for Masahiro Yamada" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Masahiro Yamada <masahiroy@...nel.org>,
 "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/vdso] x86/vdso: Simplify obj-y addition

The following commit has been merged into the x86/vdso branch of tip:

Commit-ID:     329b77b59f83440e98d792800501e5a398806860
Gitweb:        https://git.kernel.org/tip/329b77b59f83440e98d792800501e5a398806860
Author:        Masahiro Yamada <masahiroy@...nel.org>
AuthorDate:    Wed, 22 Nov 2023 08:56:59 +09:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Thu, 08 Feb 2024 13:22:08 +01:00

x86/vdso: Simplify obj-y addition

Add objects to obj-y in a more straightforward way.

CONFIG_X86_32 and CONFIG_IA32_EMULATION are not enabled simultaneously,
but even if they are, Kbuild graciously deduplicates obj-y entries.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://lore.kernel.org/r/20231121235701.239606-3-masahiroy@kernel.org
---
 arch/x86/entry/vdso/Makefile | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 2038d9c..cbfb5aa 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -18,11 +18,6 @@ OBJECT_FILES_NON_STANDARD	:= y
 # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
 KCOV_INSTRUMENT		:= n
 
-VDSO64-$(CONFIG_X86_64)		:= y
-VDSOX32-$(CONFIG_X86_X32_ABI)	:= y
-VDSO32-$(CONFIG_X86_32)		:= y
-VDSO32-$(CONFIG_IA32_EMULATION)	:= y
-
 # files to link into the vdso
 vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o
 vobjs32-y := vdso32/note.o vdso32/system_call.o vdso32/sigreturn.o
@@ -38,11 +33,11 @@ OBJECT_FILES_NON_STANDARD_vma.o		:= n
 OBJECT_FILES_NON_STANDARD_extable.o	:= n
 
 # vDSO images to build
-vdso_img-$(VDSO64-y)		+= 64
-vdso_img-$(VDSOX32-y)		+= x32
-vdso_img-$(VDSO32-y)		+= 32
+obj-$(CONFIG_X86_64)		+= vdso-image-64.o
+obj-$(CONFIG_X86_X32_ABI)	+= vdso-image-x32.o
+obj-$(CONFIG_X86_32)		+= vdso-image-32.o vdso32-setup.o
+obj-$(CONFIG_IA32_EMULATION)	+= vdso-image-32.o vdso32-setup.o
 
-obj-$(VDSO32-y)				 += vdso32-setup.o
 OBJECT_FILES_NON_STANDARD_vdso32-setup.o := n
 
 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
@@ -53,9 +48,6 @@ $(obj)/vdso.o: $(obj)/vdso.so
 targets += vdso.lds $(vobjs-y)
 targets += vdso32/vdso32.lds $(vobjs32-y)
 
-# Build the vDSO image C files and link them in.
-vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
-obj-y += $(vdso_img_objs)
 targets += $(foreach x, 64 x32 32, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg)
 
 CPPFLAGS_vdso.lds += -P -C