From 749627c3980e4421b709857e979e8aa16a4c7147 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 28 Aug 2025 12:22:21 +0200 Subject: [PATCH] x86/kbuild: Incorporate boot/startup/ via Kbuild makefile Using core-y is not the correct way to get kbuild to descend into arch/x86/boot/startup. For instance, building an individual object does not work as expected when the pattern rule is local to the Makefile $ make arch/x86/boot/startup/map_kernel.pi.o GEN Makefile CALL /home/ardb/linux/scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers make[3]: *** No rule to make target 'arch/x86/boot/startup/map_kernel.pi.o'. Stop. make[2]: *** [/home/ardb/linux/scripts/Makefile.build:461: arch/x86] Error 2 make[1]: *** [/home/ardb/linux/Makefile:2011: .] Error 2 make: *** [/home/ardb/linux/Makefile:248: __sub-make] Error 2 So use obj-y from arch.x86/Kbuild instead, which makes things work as expected. Signed-off-by: Ard Biesheuvel Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/20250828102202.1849035-42-ardb+git@google.com --- arch/x86/Kbuild | 2 ++ arch/x86/Makefile | 1 - 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild index f7fb3d88c57bd..36b985d0e7bf8 100644 --- a/arch/x86/Kbuild +++ b/arch/x86/Kbuild @@ -3,6 +3,8 @@ # Branch profiling isn't noinstr-safe. Disable it for arch/x86/* subdir-ccflags-$(CONFIG_TRACE_BRANCH_PROFILING) += -DDISABLE_BRANCH_PROFILING +obj-y += boot/startup/ + obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += coco/ obj-y += entry/ diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 1913d342969ba..9b76e77ff7f78 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -286,7 +286,6 @@ archprepare: $(cpufeaturemasks.hdr) ### # Kernel objects -core-y += arch/x86/boot/startup/ libs-y += arch/x86/lib/ # drivers-y are linked after core-y -- 2.47.3