Changes in Makefile

182c02a6 - s390/syscalls: Convert filechk to if_changed

Mon, 11 Nov 2024 13:45:54 +0000

s390/syscalls: Convert filechk to if_changedThe filechk macro always executes the syscalltbl script (and discardsthe output if there are no changes).Using if_changed is more efficient because it avoids running the scriptwhen the target is up-to-date and the command remains unchanged.All other architectures use if_changed for generating syscall headers.Signed-off-by: Masahiro Yamada Link: https://lore.kernel.org/r/20241111134603.2063226-3-masahiroy@kernel.orgSigned-off-by: Heiko Carstens List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

e17aca20 - s390/syscalls: Remove unnecessary argument of filechk_syshdr

Mon, 11 Nov 2024 13:45:53 +0000

s390/syscalls: Remove unnecessary argument of filechk_syshdrThe filechk_syshdr macro receives $@ in both cases, making the argumentredundant.Signed-off-by: Masahiro Yamada Link: https://lore.kernel.org/r/20241111134603.2063226-2-masahiroy@kernel.orgSigned-off-by: Heiko Carstens List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

0708967e - s390/syscalls: Avoid creation of arch/arch/ directory

Mon, 11 Nov 2024 13:45:52 +0000

s390/syscalls: Avoid creation of arch/arch/ directoryBuilding the kernel with ARCH=s390 creates a weird arch/arch/ directory. $ find arch/arch arch/arch arch/arch/s390 arch/arch/s390/include arch/arch/s390/include/generated arch/arch/s390/include/generated/asm arch/arch/s390/include/generated/uapi arch/arch/s390/include/generated/uapi/asmThe root cause is 'targets' in arch/s390/kernel/syscalls/Makefile,where the relative path is incorrect.Strictly speaking, 'targets' was not necessary in the first placebecause this Makefile uses 'filechk' instead of 'if_changed'.However, this commit keeps it, as it will be useful when converting'filechk' to 'if_changed' later.Fixes: 5c75824d915e ("s390/syscalls: add Makefile to generate system call header files")Signed-off-by: Masahiro Yamada Link: https://lore.kernel.org/r/20241111134603.2063226-1-masahiroy@kernel.orgSigned-off-by: Heiko Carstens List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

b1992c37 - kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Sat, 27 Apr 2024 14:55:02 +0000

kbuild: use $(src) instead of $(srctree)/$(src) for source directoryKbuild conventionally uses $(obj)/ for generated files, and $(src)/ forchecked-in source files. It is merely a convention without any functionaldifference. In fact, $(obj) and $(src) are exactly the same, as definedin scripts/Makefile.build: src := $(obj)When the kernel is built in a separate output directory, $(src) doesnot accurately reflect the source directory location. While Kbuildresolves this discrepancy by specifying VPATH=$(srctree) to search forsource files, it does not cover all cases. For example, when adding aheader search path for local headers, -I$(srctree)/$(src) is typicallypassed to the compiler.This introduces inconsistency between upstream and downstream Makefilesbecause $(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 followingmeanings: $(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 treeConsequently, $(srctree)/$(src) in upstream Makefiles need to be replacedwith $(src).Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

bbc90bc1 - arch: syscalls: simplify uapi/kapi directory creation

Sun, 27 Feb 2022 09:10:24 +0000

arch: syscalls: simplify uapi/kapi directory creation$(shell ...) expands to empty. There is no need to assign it to _dummy.Signed-off-by: Masahiro Yamada Acked-by: Geert Uytterhoeven List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

ba97df45 - kbuild: use assignment instead of define ... endef for filechk_* rules

Thu, 03 Jan 2019 01:16:54 +0000

kbuild: use assignment instead of define ... endef for filechk_* rulesYou do not have to use define ... endef for filechk_* rules.For simple cases, the use of assignment looks cleaner, IMHO.I updated the usage for scripts/Kbuild.include in case somebodymisunderstands the 'define ... endif' is the requirement.Signed-off-by: Masahiro Yamada Acked-by: Heiko Carstens List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

43fee2b2 - kbuild: do not redirect the first prerequisite for filechk

Wed, 25 Jul 2018 05:16:11 +0000

kbuild: do not redirect the first prerequisite for filechkCurrently, filechk unconditionally opens the first prerequisite andredirects it as the stdin of a filechk_* rule. Hence, every targetusing $(call filechk,...) must list something as the first prerequisiteeven if it is unneeded.'< $<' is actually unneeded in most cases. Each rule can explicitlyadds it if necessary.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile

5c75824d - s390/syscalls: add Makefile to generate system call header files

Mon, 11 Dec 2017 13:54:08 +0000

s390/syscalls: add Makefile to generate system call header filesGenerate the system call specific files from the archheadersand archprepare make targets.Signed-off-by: Hendrik Brueckner Acked-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/kernel/syscalls/Makefile