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authorMasahiro Yamada <masahiroy@kernel.org>2024-04-27 17:55:02 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2024-05-09 22:34:52 +0300
commitb1992c3772e69a6fd0e3fc81cd4d2820c8b6eca0 (patch)
tree60cc6428700d3582666b62d1d9dd741656efe1ee /arch/x86/mm
parent9a0ebe5011f49e932bb0a2cea2034fd65e6e567e (diff)
downloadlinux-b1992c3772e69a6fd0e3fc81cd4d2820c8b6eca0.tar.xz
kbuild: use $(src) instead of $(srctree)/$(src) for source directory
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for checked-in source files. It is merely a convention without any functional difference. In fact, $(obj) and $(src) are exactly the same, as defined in scripts/Makefile.build: src := $(obj) When the kernel is built in a separate output directory, $(src) does not accurately reflect the source directory location. While Kbuild resolves this discrepancy by specifying VPATH=$(srctree) to search for source files, it does not cover all cases. For example, when adding a header search path for local headers, -I$(srctree)/$(src) is typically passed to the compiler. This introduces inconsistency between upstream and downstream Makefiles because $(src) is used instead of $(srctree)/$(src) for the latter. To address this inconsistency, this commit changes the semantics of $(src) so that it always points to the directory in the source tree. Going forward, the variables used in Makefiles will have the following meanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source tree Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced with $(src). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 428048e73bd2..8d3a00e5c528 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -34,7 +34,7 @@ obj-y += pat/
CFLAGS_physaddr.o := -fno-stack-protector
CFLAGS_mem_encrypt_identity.o := -fno-stack-protector
-CFLAGS_fault.o := -I $(srctree)/$(src)/../include/asm/trace
+CFLAGS_fault.o := -I $(src)/../include/asm/trace
obj-$(CONFIG_X86_32) += pgtable_32.o iomap_32.o