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2020-01-07kbuild: create modules.builtin without Makefile.modbuiltin or tristate.confMasahiro Yamada1-16/+5
Commit bc081dd6e9f6 ("kbuild: generate modules.builtin") added infrastructure to generate modules.builtin, the list of all builtin modules. Basically, it works like this: - Kconfig generates include/config/tristate.conf, the list of tristate CONFIG options with a value in a capital letter. - scripts/Makefile.modbuiltin makes Kbuild descend into directories to collect the information of builtin modules. I am not a big fan of it because Kbuild ends up with traversing the source tree twice. I am not sure how perfectly it should work, but this approach cannot avoid false positives; even if the relevant CONFIG option is tristate, some Makefiles forces obj-m to obj-y. Some examples are: arch/powerpc/platforms/powermac/Makefile: obj-$(CONFIG_NVRAM:m=y) += nvram.o net/ipv6/Makefile: obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_hashtables.o net/netlabel/Makefile: obj-$(subst m,y,$(CONFIG_IPV6)) += netlabel_calipso.o Nobody has complained about (or noticed) it, so it is probably fine to have false positives in modules.builtin. This commit simplifies the implementation. Let's exploit the fact that every module has MODULE_LICENSE(). (modpost shows a warning if MODULE_LICENSE is missing. If so, 0-day bot would already have blocked such a module.) I added MODULE_FILE to <linux/module.h>. When the code is being compiled as builtin, it will be filled with the file path of the module, and collected into modules.builtin.info. Then, scripts/link-vmlinux.sh extracts the list of builtin modules out of it. This new approach fixes the false-positives above, but adds another type of false-positives; non-modular code may have MODULE_LICENSE() by mistake. This is not a big deal, it is just the code is always orphan. We can clean it up if we like. You can see cleanup examples by: $ git log --grep='make.* explicitly non-modular' To sum up, this commits deletes lots of code, but still produces almost equivalent results. Please note it does not increase the vmlinux size at all. As you can see in include/asm-generic/vmlinux.lds.h, the .modinfo section is discarded in the link stage. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-01-05Linux 5.5-rc5v5.5-rc5Linus Torvalds1-1/+1
2019-12-29Linux 5.5-rc4v5.5-rc4Linus Torvalds1-1/+1
2019-12-22Linux 5.5-rc3v5.5-rc3Linus Torvalds1-1/+1
2019-12-21Merge tag 'kbuild-fixes-v5.5' of ↵Linus Torvalds1-1/+2
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - fix warning in out-of-tree 'make clean' - add READELF variable to the top Makefile - fix broken builds when LINUX_COMPILE_BY contains a backslash - fix build warning in kallsyms - fix NULL pointer access in expr_eq() in Kconfig - fix missing dependency on rsync in deb-pkg build - remove ---help--- from documentation - fix misleading documentation about directory descending * tag 'kbuild-fixes-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: clarify the difference between obj-y and obj-m w.r.t. descending kconfig: remove ---help--- from documentation scripts: package: mkdebian: add missing rsync dependency kconfig: don't crash on NULL expressions in expr_eq() scripts/kallsyms: fix offset overflow of kallsyms_relative_base mkcompile_h: use printf for LINUX_COMPILE_BY mkcompile_h: git rid of UTS_TRUNCATE from LINUX_COMPILE_{BY,HOST} x86/boot: kbuild: allow readelf executable to be specified kbuild: fix 'No such file or directory' warning when cleaning
2019-12-15Linux 5.5-rc2v5.5-rc2Linus Torvalds1-1/+1
2019-12-14x86/boot: kbuild: allow readelf executable to be specifiedDmitry Golovin1-1/+2
Introduce a new READELF variable to top-level Makefile, so the name of readelf binary can be specified. Before this change the name of the binary was hardcoded to "$(CROSS_COMPILE)readelf" which might not be present for every toolchain. This allows to build with LLVM Object Reader by using make parameter READELF=llvm-readelf. Link: https://github.com/ClangBuiltLinux/linux/issues/771 Signed-off-by: Dmitry Golovin <dima@golovin.in> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2019-12-08Linux 5.5-rc1v5.5-rc1Linus Torvalds1-2/+2
2019-12-02Merge tag 'kbuild-v5.5' of ↵Linus Torvalds1-62/+59
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - remove unneeded asm headers from hexagon, ia64 - add 'dir-pkg' target, which works like 'tar-pkg' but skips archiving - add 'helpnewconfig' target, which shows help for new CONFIG options - support 'make nsdeps' for external modules - make rebuilds faster by deleting $(wildcard $^) checks - remove compile tests for kernel-space headers - refactor modpost to simplify modversion handling - make single target builds faster - optimize and clean up scripts/kallsyms.c - refactor various Makefiles and scripts * tag 'kbuild-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (59 commits) MAINTAINERS: update Kbuild/Kconfig maintainer's email address scripts/kallsyms: remove redundant initializers scripts/kallsyms: put check_symbol_range() calls close together scripts/kallsyms: make check_symbol_range() void function scripts/kallsyms: move ignored symbol types to is_ignored_symbol() scripts/kallsyms: move more patterns to the ignored_prefixes array scripts/kallsyms: skip ignored symbols very early scripts/kallsyms: add const qualifiers where possible scripts/kallsyms: make find_token() return (unsigned char *) scripts/kallsyms: replace prefix_underscores_count() with strspn() scripts/kallsyms: add sym_name() to mitigate cast ugliness scripts/kallsyms: remove unneeded length check for prefix matching scripts/kallsyms: remove redundant is_arm_mapping_symbol() scripts/kallsyms: set relative_base more effectively scripts/kallsyms: shrink table before sorting it scripts/kallsyms: fix definitely-lost memory leak scripts/kallsyms: remove unneeded #ifndef ARRAY_SIZE kbuild: make single target builds even faster modpost: respect the previous export when 'exported twice' is warned modpost: do not set ->preloaded for symbols from Module.symvers ...
2019-11-24Linux 5.4v5.4Linus Torvalds1-1/+1
2019-11-23kbuild: make single target builds even fasterMasahiro Yamada1-43/+47
Commit 2dffd23f81a3 ("kbuild: make single target builds much faster") made the situation much better. To improve it even more, apply the similar idea to the top Makefile. Trim unrelated directories from build-dirs. The single build code must be moved above the 'descend' target. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Jens Axboe <axboe@kernel.dk>
2019-11-17Linux 5.4-rc8v5.4-rc8Linus Torvalds1-1/+1
2019-11-15kbuild: move headers_check rule to usr/include/MakefileMasahiro Yamada1-8/+3
Currently, some sanity checks for uapi headers are done by scripts/headers_check.pl, which is wired up to the 'headers_check' target in the top Makefile. It is true compiling headers has better test coverage, but there are still several headers excluded from the compile test. I like to keep headers_check.pl for a while, but we can delete a lot of code by moving the build rule to usr/include/Makefile. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-15kbuild: remove header compile testMasahiro Yamada1-1/+0
There are both positive and negative options about this feature. At first, I thought it was a good idea, but actually Linus stated a negative opinion (https://lkml.org/lkml/2019/9/29/227). I admit it is ugly and annoying. The baseline I'd like to keep is the compile-test of uapi headers. (Otherwise, kernel developers have no way to ensure the correctness of the exported headers.) I will maintain a small build rule in usr/include/Makefile. Remove the other header test functionality. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-15kbuild: tell sparse about the $ARCHLuc Van Oostenryck1-0/+3
Sparse uses the same executable for all archs and uses flags like -m64, -mbig-endian or -D__arm__ for arch-specific parameters. But Sparse also uses value from the host machine used to build Sparse as default value for the target machine. This works, of course, well for native build but can create problems when cross-compiling, like defining both '__i386__' and '__arm__' when cross-compiling for arm on a x86-64 machine. Fix this by explicitely telling sparse the target architecture. Reported-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-11scripts/nsdeps: support nsdeps for external module buildsMasahiro Yamada1-1/+2
scripts/nsdeps is written to take care of only in-tree modules. Perhaps, this is not a bug, but just a design. At least, Documentation/core-api/symbol-namespaces.rst focuses on in-tree modules. Having said that, some people already tried nsdeps for external modules. So, it would be nice to support it. Reported-by: Steve French <smfrench@gmail.com> Reported-by: Jessica Yu <jeyu@kernel.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Jessica Yu <jeyu@kernel.org> Acked-by: Jessica Yu <jeyu@kernel.org> Reviewed-by: Matthias Maennich <maennich@google.com> Tested-by: Matthias Maennich <maennich@google.com>
2019-11-11modpost: dump missing namespaces into a single modules.nsdeps fileMasahiro Yamada1-2/+2
The modpost, with the -d option given, generates per-module .ns_deps files. Kbuild generates per-module .mod files to carry module information. This is convenient because Make handles multiple jobs in parallel when the -j option is given. On the other hand, the modpost always runs as a single thread. I do not see a strong reason to produce separate .ns_deps files. This commit changes the modpost to generate just one file, modules.nsdeps, each line of which has the following format: <module_name>: <list of missing namespaces> Please note it contains *missing* namespaces instead of required ones. So, modules.nsdeps is empty if the namespace dependency is all good. This will work more efficiently because spatch will no longer process already imported namespaces. I removed the '(if needed)' from the nsdeps log since spatch is invoked only when needed. This also solves the stale .ns_deps problem reported by Jessica Yu: https://lkml.org/lkml/2019/10/28/467 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Jessica Yu <jeyu@kernel.org> Acked-by: Jessica Yu <jeyu@kernel.org> Reviewed-by: Matthias Maennich <maennich@google.com> Tested-by: Matthias Maennich <maennich@google.com>
2019-11-11modpost: do not invoke extra modpost for nsdepsMasahiro Yamada1-3/+2
'make nsdeps' invokes the modpost three times at most; before linking vmlinux, before building modules, and finally for generating .ns_deps files. Running the modpost again and again is not efficient. The last two can be unified. When the -d option is given, the modpost still does the usual job, and in addition, generates .ns_deps files. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Matthias Maennich <maennich@google.com> Reviewed-by: Matthias Maennich <maennich@google.com>
2019-11-11kbuild: Extend defconfig field size from 24 to 27Geert Uytterhoeven1-1/+1
There are 6 defconfigs with names longer than 24 characters, breaking alignment in "make help". The "winner" is "ecovec24-romimage_defconfig", counting in at 27 characters. Extend the defconfig field size to 27 to restore alignment. Don't use a larger value, to not encourage people to create even longer defconfig names. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-11kbuild: Wrap long "make help" text linesGeert Uytterhoeven1-1/+2
Some "make help" text lines extend beyond 80 characters. Wrap them before an opening parenthesis, or before 80 characters. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-11kbuild: remove unneeded variable, single-allMasahiro Yamada1-4/+2
When single-build is set, everything in $(MAKECMDGOALS) is a single target. You can use $(MAKECMDGOALS) to list out the single targets. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-10Linux 5.4-rc7v5.4-rc7Linus Torvalds1-1/+1
2019-11-03Linux 5.4-rc6v5.4-rc6Linus Torvalds1-1/+1
2019-10-27Linux 5.4-rc5v5.4-rc5Linus Torvalds1-2/+2
2019-10-20Linux 5.4-rc4v5.4-rc4Linus Torvalds1-1/+1
2019-10-15kbuild: update comment about KBUILD_ALLDIRSMasahiro Yamada1-1/+1
Commit 000ec95fbe75 ("kbuild: pkg: rename scripts/package/Makefile to scripts/Makefile.package") missed to update this comment. Fixes: 000ec95fbe75 ("kbuild: pkg: rename scripts/package/Makefile to scripts/Makefile.package") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-10-13Linux 5.4-rc3v5.4-rc3Linus Torvalds1-1/+1
2019-10-11Merge tag 'modules-for-v5.4-rc3' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux Pull module fixes from Jessica Yu: "Code cleanups and kbuild/namespace related fixups from Masahiro. Most importantly, it fixes a namespace-related modpost issue for external module builds - Fix broken external module builds due to a modpost bug in read_dump(), where the namespace was not being strdup'd and sym->namespace would be set to bogus data. - Various namespace-related kbuild fixes and cleanups thanks to Masahiro Yamada" * tag 'modules-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux: doc: move namespaces.rst from kbuild/ to core-api/ nsdeps: make generated patches independent of locale nsdeps: fix hashbang of scripts/nsdeps kbuild: fix build error of 'make nsdeps' in clean tree module: rename __kstrtab_ns_* to __kstrtabns_* to avoid symbol conflict modpost: fix broken sym->namespace for external module builds module: swap the order of symbol.namespace scripts: add_namespace: Fix coccicheck failed
2019-10-08Merge tag 'linux-kselftest-5.4-rc3' of ↵Linus Torvalds1-3/+2
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest fixes from Shuah Khan: "Fixes for existing tests and the framework. Cristian Marussi's patches add the ability to skip targets (tests) and exclude tests that didn't build from run-list. These patches improve the Kselftest results. Ability to skip targets helps avoid running tests that aren't supported in certain environments. As an example, bpf tests from mainline aren't supported on stable kernels and have dependency on bleeding edge llvm. Being able to skip bpf on systems that can't meet this llvm dependency will be helpful. Kselftest can be built and installed from the main Makefile. This change help simplify Kselftest use-cases which addresses request from users. Kees Cook added per test timeout support to limit individual test run-time" * tag 'linux-kselftest-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests: watchdog: Add command line option to show watchdog_info selftests: watchdog: Validate optional file argument selftests/kselftest/runner.sh: Add 45 second timeout per test kselftest: exclude failed TARGETS from runlist kselftest: add capability to skip chosen TARGETS selftests: Add kselftest-all and kselftest-install targets
2019-10-07kbuild: fix build error of 'make nsdeps' in clean treeMasahiro Yamada1-1/+1
Running 'make nsdeps' in a clean source tree fails as follows: $ make -s clean; make -s defconfig; make nsdeps [ snip ] awk: fatal: cannot open file `init/modules.order' for reading (No such file or directory) make: *** [Makefile;1307: modules.order] Error 2 make: *** Deleting file 'modules.order' make: *** Waiting for unfinished jobs.... The cause of the error is 'make nsdeps' does not build modules at all. Set KBUILD_MODULES to fix it. Reviewed-by: Matthias Maennich <maennich@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Jessica Yu <jeyu@kernel.org>
2019-10-06Linux 5.4-rc2v5.4-rc2Linus Torvalds1-2/+2
2019-10-01selftests: Add kselftest-all and kselftest-install targetsShuah Khan1-3/+2
Add kselftest-all target to build tests from the top level Makefile. This is to simplify kselftest use-cases for CI and distributions where build and test systems are different. Current kselftest target builds and runs tests on a development system which is a developer use-case. Add kselftest-install target to install tests from the top level Makefile. This is to simplify kselftest use-cases for CI and distributions where build and test systems are different. This change addresses requests from developers and testers to add support for installing kselftest from the main Makefile. In addition, make the install directory the same when install is run using "make kselftest-install" or by running kselftest_install.sh. Also fix the INSTALL_PATH variable conflict between main Makefile and selftests Makefile. Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2019-10-01kbuild: remove SUBDIRS supportMasahiro Yamada1-18/+2
Linux 5.3 is out. Remove the SUBDIRS support. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-10-01kbuild: remove ar-option and KBUILD_ARFLAGSMasahiro Yamada1-4/+0
Commit 40df759e2b9e ("kbuild: Fix build with binutils <= 2.19") introduced ar-option and KBUILD_ARFLAGS to deal with old binutils. According to Documentation/process/changes.rst, the current minimal supported version of binutils is 2.21 so you can assume the 'D' option is always supported. Not only GNU ar but also llvm-ar supports it. With the 'D' option hard-coded, there is no more user of ar-option or KBUILD_ARFLAGS. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com>
2019-09-30Linux 5.4-rc1v5.4-rc1Linus Torvalds1-2/+2
2019-09-22Merge tag 'modules-for-v5.4' of ↵Linus Torvalds1-1/+13
git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux Pull modules updates from Jessica Yu: "The main bulk of this pull request introduces a new exported symbol namespaces feature. The number of exported symbols is increasingly growing with each release (we're at about 31k exports as of 5.3-rc7) and we currently have no way of visualizing how these symbols are "clustered" or making sense of this huge export surface. Namespacing exported symbols allows kernel developers to more explicitly partition and categorize exported symbols, as well as more easily limiting the availability of namespaced symbols to other parts of the kernel. For starters, we have introduced the USB_STORAGE namespace to demonstrate the API's usage. I have briefly summarized the feature and its main motivations in the tag below. Summary: - Introduce exported symbol namespaces. This new feature allows subsystem maintainers to partition and categorize their exported symbols into explicit namespaces. Module authors are now required to import the namespaces they need. Some of the main motivations of this feature include: allowing kernel developers to better manage the export surface, allow subsystem maintainers to explicitly state that usage of some exported symbols should only be limited to certain users (think: inter-module or inter-driver symbols, debugging symbols, etc), as well as more easily limiting the availability of namespaced symbols to other parts of the kernel. With the module import requirement, it is also easier to spot the misuse of exported symbols during patch review. Two new macros are introduced: EXPORT_SYMBOL_NS() and EXPORT_SYMBOL_NS_GPL(). The API is thoroughly documented in Documentation/kbuild/namespaces.rst. - Some small code and kbuild cleanups here and there" * tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux: module: Remove leftover '#undef' from export header module: remove unneeded casts in cmp_name() module: move CONFIG_UNUSED_SYMBOLS to the sub-menu of MODULES module: remove redundant 'depends on MODULES' module: Fix link failure due to invalid relocation on namespace offset usb-storage: export symbols in USB_STORAGE namespace usb-storage: remove single-use define for debugging docs: Add documentation for Symbol Namespaces scripts: Coccinelle script for namespace dependencies. modpost: add support for generating namespace dependencies export: allow definition default namespaces in Makefiles or sources module: add config option MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS modpost: add support for symbol namespaces module: add support for symbol namespaces. export: explicitly align struct kernel_symbol module: support reading multiple values per modinfo tag
2019-09-20Merge tag 'kbuild-v5.4' of ↵Linus Torvalds1-145/+151
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - add modpost warn exported symbols marked as 'static' because 'static' and EXPORT_SYMBOL is an odd combination - break the build early if gold linker is used - optimize the Bison rule to produce .c and .h files by a single pattern rule - handle PREEMPT_RT in the module vermagic and UTS_VERSION - warn CONFIG options leaked to the user-space except existing ones - make single targets work properly - rebuild modules when module linker scripts are updated - split the module final link stage into scripts/Makefile.modfinal - fix the missed error code in merge_config.sh - improve the error message displayed on the attempt of the O= build in unclean source tree - remove 'clean-dirs' syntax - disable -Wimplicit-fallthrough warning for Clang - add CONFIG_CC_OPTIMIZE_FOR_SIZE_O3 for ARC - remove ARCH_{CPP,A,C}FLAGS variables - add $(BASH) to run bash scripts - change *CFLAGS_<basetarget>.o to take the relative path to $(obj) instead of the basename - stop suppressing Clang's -Wunused-function warnings when W=1 - fix linux/export.h to avoid genksyms calculating CRC of trimmed exported symbols - misc cleanups * tag 'kbuild-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (63 commits) genksyms: convert to SPDX License Identifier for lex.l and parse.y modpost: use __section in the output to *.mod.c modpost: use MODULE_INFO() for __module_depends export.h, genksyms: do not make genksyms calculate CRC of trimmed symbols export.h: remove defined(__KERNEL__), which is no longer needed kbuild: allow Clang to find unused static inline functions for W=1 build kbuild: rename KBUILD_ENABLE_EXTRA_GCC_CHECKS to KBUILD_EXTRA_WARN kbuild: refactor scripts/Makefile.extrawarn merge_config.sh: ignore unwanted grep errors kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj) modpost: add NOFAIL to strndup modpost: add guid_t type definition kbuild: add $(BASH) to run scripts with bash-extension kbuild: remove ARCH_{CPP,A,C}FLAGS kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC kbuild: Do not enable -Wimplicit-fallthrough for clang for now kbuild: clean up subdir-ymn calculation in Makefile.clean kbuild: remove unneeded '+' marker from cmd_clean kbuild: remove clean-dirs syntax kbuild: check clean srctree even earlier ...
2019-09-19Merge tag 'devicetree-for-5.4' of ↵Linus Torvalds1-2/+4
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull Devicetree updates from Rob Herring: - a bunch of DT binding conversions to DT schema format - clean-ups of the Arm idle-states binding - support a default number of cells in of_for_each_phandle() when the cells name is missing - expose dtbs_check and dt_binding_check in the make help - convert writting-schema.md to ReST - HiSilicon reset controller binding updates - add documentation for MT8516 RNG * tag 'devicetree-for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (46 commits) of: restore old handling of cells_name=NULL in of_*_phandle_with_args() bus: qcom: fix spelling mistake "ambigous" -> "ambiguous" of: Let of_for_each_phandle fallback to non-negative cell_count iommu: pass cell_count = -1 to of_for_each_phandle with cells_name dt-bindings: arm: Convert Realtek board/soc bindings to json-schema dt-bindings: arm: Convert Actions Semi bindings to jsonschema dt-bindings: Correct spelling in example schema dt-bindings: cpu: Add a support cpu type for cortex-a55 dt-bindings: gpu: mali-midgard: Add samsung exynos5250 compatible dt-bindings: arm: idle-states: Move exit-latency-us explanation dt-bindings: arm: idle-states: Add punctuation to improve readability dt-bindings: arm: idle-states: Correct "constraint guarantees" dt-bindings: arm: idle-states: Correct references to wake-up delay dt-bindings: arm: idle-states: Use "e.g." and "i.e." consistently pinctrl-mcp23s08: Fix property-name in dt-example dt-bindings: Clarify interrupts-extended usage dt-bindings: Convert Arm Mali Utgard GPU to DT schema dt-bindings: Convert Arm Mali Bifrost GPU to DT schema dt-bindings: Convert Arm Mali Midgard GPU to DT schema dt-bindings: irq: Convert Allwinner NMI Controller to a schema ...
2019-09-16Merge tag 'arm64-upstream' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "Although there isn't tonnes of code in terms of line count, there are a fair few headline features which I've noted both in the tag and also in the merge commits when I pulled everything together. The part I'm most pleased with is that we had 35 contributors this time around, which feels like a big jump from the usual small group of core arm64 arch developers. Hopefully they all enjoyed it so much that they'll continue to contribute, but we'll see. It's probably worth highlighting that we've pulled in a branch from the risc-v folks which moves our CPU topology code out to where it can be shared with others. Summary: - 52-bit virtual addressing in the kernel - New ABI to allow tagged user pointers to be dereferenced by syscalls - Early RNG seeding by the bootloader - Improve robustness of SMP boot - Fix TLB invalidation in light of recent architectural clarifications - Support for i.MX8 DDR PMU - Remove direct LSE instruction patching in favour of static keys - Function error injection using kprobes - Support for the PPTT "thread" flag introduced by ACPI 6.3 - Move PSCI idle code into proper cpuidle driver - Relaxation of implicit I/O memory barriers - Build with RELR relocations when toolchain supports them - Numerous cleanups and non-critical fixes" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (114 commits) arm64: remove __iounmap arm64: atomics: Use K constraint when toolchain appears to support it arm64: atomics: Undefine internal macros after use arm64: lse: Make ARM64_LSE_ATOMICS depend on JUMP_LABEL arm64: asm: Kill 'asm/atomic_arch.h' arm64: lse: Remove unused 'alt_lse' assembly macro arm64: atomics: Remove atomic_ll_sc compilation unit arm64: avoid using hard-coded registers for LSE atomics arm64: atomics: avoid out-of-line ll/sc atomics arm64: Use correct ll/sc atomic constraints jump_label: Don't warn on __exit jump entries docs/perf: Add documentation for the i.MX8 DDR PMU perf/imx_ddr: Add support for AXI ID filtering arm64: kpti: ensure patched kernel text is fetched from PoU arm64: fix fixmap copy for 16K pages and 48-bit VA perf/smmuv3: Validate groups for global filtering perf/smmuv3: Validate group size arm64: Relax Documentation/arm64/tagged-pointers.rst arm64: kvm: Replace hardcoded '1' with SYS_PAR_EL1_F arm64: mm: Ignore spurious translation faults taken from the kernel ...
2019-09-15Linux 5.3v5.3Linus Torvalds1-1/+1
2019-09-10scripts: Coccinelle script for namespace dependencies.Matthias Maennich1-0/+12
A script that uses the '<module>.ns_deps' files generated by modpost to automatically add the required symbol namespace dependencies to each module. Usage: 1) Move some symbols to a namespace with EXPORT_SYMBOL_NS() or define DEFAULT_SYMBOL_NAMESPACE 2) Run 'make' (or 'make modules') and get warnings about modules not importing that namespace. 3) Run 'make nsdeps' to automatically add required import statements to said modules. This makes it easer for subsystem maintainers to introduce and maintain symbol namespaces into their codebase. Co-developed-by: Martijn Coenen <maco@android.com> Signed-off-by: Martijn Coenen <maco@android.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Matthias Maennich <maennich@google.com> Signed-off-by: Jessica Yu <jeyu@kernel.org>
2019-09-10modpost: add support for generating namespace dependenciesMatthias Maennich1-1/+1
This patch adds an option to modpost to generate a <module>.ns_deps file per module, containing the namespace dependencies for that module. E.g. if the linked module my-module.ko would depend on the symbol myfunc.MY_NS in the namespace MY_NS, the my-module.ns_deps file created by modpost would contain the entry MY_NS to express the namespace dependency of my-module imposed by using the symbol myfunc. These files can subsequently be used by static analysis tools (like coccinelle scripts) to address issues with missing namespace imports. A later patch of this series will introduce such a script 'nsdeps' and a corresponding make target to automatically add missing MODULE_IMPORT_NS() definitions to the module's sources. For that it uses the information provided in the generated .ns_deps files. Co-developed-by: Martijn Coenen <maco@android.com> Signed-off-by: Martijn Coenen <maco@android.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Matthias Maennich <maennich@google.com> Signed-off-by: Jessica Yu <jeyu@kernel.org>
2019-09-08Linux 5.3-rc8v5.3-rc8Linus Torvalds1-1/+1
2019-09-06kbuild: rename KBUILD_ENABLE_EXTRA_GCC_CHECKS to KBUILD_EXTRA_WARNMasahiro Yamada1-1/+1
KBUILD_ENABLE_EXTRA_GCC_CHECKS started as a switch to add extra warning options for GCC, but now it is a historical misnomer since we use it also for Clang, DTC, and even kernel-doc. Rename it to more sensible, shorter KBUILD_EXTRA_WARN. For the backward compatibility, KBUILD_ENABLE_EXTRA_GCC_CHECKS is still supported (but not advertised in the documentation). I also fixed up 'make help', and updated the documentation. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
2019-09-04kbuild: add $(BASH) to run scripts with bash-extensionMasahiro Yamada1-6/+5
CONFIG_SHELL falls back to sh when bash is not installed on the system, but nobody is testing such a case since bash is usually installed. So, shell scripts invoked by CONFIG_SHELL are only tested with bash. It makes it difficult to test whether the hashbang #!/bin/sh is real. For example, #!/bin/sh in arch/powerpc/kernel/prom_init_check.sh is false. (I fixed it up) Besides, some shell scripts invoked by CONFIG_SHELL use bash-extension and #!/bin/bash is specified as the hashbang, while CONFIG_SHELL may not always be set to bash. Probably, the right thing to do is to introduce BASH, which is bash by default, and always set CONFIG_SHELL to sh. Replace $(CONFIG_SHELL) with $(BASH) for bash scripts. If somebody tries to add bash-extension to a #!/bin/sh script, it will be caught in testing because /bin/sh is a symlink to dash on some major distributions. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-09-04kbuild: remove ARCH_{CPP,A,C}FLAGSMasahiro Yamada1-10/+4
These flags were added by commit 61754c18752f ("kbuild: Allow arch Makefiles to override {cpp,ld,c}flags") to allow ARC to override -O2. We did not see any other usage after all. Now that ARC switched to CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3, there is no more user of these variables. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-09-04kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARCMasahiro Yamada1-4/+6
arch/arc/Makefile overrides -O2 with -O3. This is the only user of ARCH_CFLAGS. There is no user of ARCH_CPPFLAGS or ARCH_AFLAGS. My plan is to remove ARCH_{CPP,A,C}FLAGS after refactoring the ARC Makefile. Currently, ARC has no way to enable -Wmaybe-uninitialized because both -O3 and -Os disable it. Enabling it will be useful for compile-testing. This commit allows allmodconfig (, which defaults to -O2) to enable it. Add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y to all the defconfig files in arch/arc/configs/ in order to keep the current config settings. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2019-09-02Linux 5.3-rc7v5.3-rc7Linus Torvalds1-1/+1
2019-08-30kbuild: Do not enable -Wimplicit-fallthrough for clang for nowNathan Chancellor1-3/+5
This functionally reverts commit bfd77145f35c ("Makefile: Convert -Wimplicit-fallthrough=3 to just -Wimplicit-fallthrough for clang"). clang enabled support for -Wimplicit-fallthrough in C in r369414 [1], which causes a lot of warnings when building the kernel for two reasons: 1. Clang does not support the /* fall through */ comments. There seems to be a general consensus in the LLVM community that this is not something they want to support. Joe Perches wrote a script to convert all of the comments to a "fallthrough" keyword that will be added to compiler_attributes.h [2] [3], which catches the vast majority of the comments. There doesn't appear to be any consensus in the kernel community when to do this conversion. 2. Clang and GCC disagree about falling through to final case statements with no content or cases that simply break: https://godbolt.org/z/c8csDu This difference contributes at least 50 warnings in an allyesconfig build for x86, not considering other architectures. This difference will need to be discussed to see which compiler is right [4] [5]. [1]: https://github.com/llvm/llvm-project/commit/1e0affb6e564b7361b0aadb38805f26deff4ecfc [2]: https://lore.kernel.org/lkml/61ddbb86d5e68a15e24ccb06d9b399bbf5ce2da7.camel@perches.com/ [3]: https://lore.kernel.org/lkml/1d2830aadbe9d8151728a7df5b88528fc72a0095.1564549413.git.joe@perches.com/ [4]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91432 [5]: https://github.com/ClangBuiltLinux/linux/issues/636 Given these two problems need discussion and coordination, do not enable -Wimplicit-fallthrough with clang right now. Add a comment to explain what is going on as well. This commit should be reverted once these two issues are fully flushed out and resolved. Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-08-29kbuild: check clean srctree even earlierMasahiro Yamada1-3/+3
Move the outputmakefile target to the leftmost in the prerequisite list so that this is checked first. GNU Make processes the prerequisites left to right. GNU Make will keep to stick to this behavior, and it seems even POSIX standard, according to this: https://lists.gnu.org/archive/html/bug-make/2019-08/msg00030.html The POSIX standard of make is available here: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html Of course, when the parallel option -j given, other targets will be run simultaneously but it is nice to show the error as early as possible. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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