Changes in Kconfig

0d2cdc35 - io_uring: Rename KConfig to Kconfig

Wed, 19 Feb 2025 14:47:58 +0000

io_uring: Rename KConfig to KconfigKconfig files are traditionally named "Kconfig".Fixes: 6f377873cb239050 ("io_uring/zcrx: add interface queue and refill queue")Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/5ae387c1465f54768b51a5a1ca87be7934c4b2ad.1739976387.git.geert+renesas@glider.beSigned-off-by: Jens Axboe List of files: /linux-6.15/Kconfig

6f377873 - io_uring/zcrx: add interface queue and refill queue

Sat, 15 Feb 2025 00:09:36 +0000

io_uring/zcrx: add interface queue and refill queueAdd a new object called an interface queue (ifq) that represents a netrx queue that has been configured for zero copy. Each ifq is registeredusing a new registration opcode IORING_REGISTER_ZCRX_IFQ.The refill queue is allocated by the kernel and mapped by userspaceusing a new offset IORING_OFF_RQ_RING, in a similar fashion to the mainSQ/CQ. It is used by userspace to return buffers that it is done with,which will then be re-used by the netdev again.The main CQ ring is used to notify userspace of received data by usingthe upper 16 bytes of a big CQE as a new struct io_uring_zcrx_cqe. Eachentry contains the offset + len to the data.For now, each io_uring instance only has a single ifq.Reviewed-by: Jens Axboe Signed-off-by: David Wei Acked-by: Jakub Kicinski Link: https://lore.kernel.org/r/20250215000947.789731-2-dw@davidwei.ukSigned-off-by: Jens Axboe List of files: /linux-6.15/Kconfig

8b59cd81 - kbuild: ensure full rebuild when the compiler is updated

Thu, 23 Apr 2020 14:23:52 +0000

kbuild: ensure full rebuild when the compiler is updatedCommit 21c54b774744 ("kconfig: show compiler version text in the topcomment") added the environment variable, CC_VERSION_TEXT in the commentof the top Kconfig file. It can detect the compiler update, and invokethe syncconfig because all environment variables referenced in Kconfigfiles are recorded in include/config/auto.conf.cmdThis commit makes it a CONFIG option in order to ensure the full rebuildwhen the compiler is updated.This works like follows:include/config/kconfig.h contains "CONFIG_CC_VERSION_TEXT" in the commentblock.The top Makefile specifies "-include $(srctree)/include/linux/kconfig.h"to guarantee it is included from all kernel source files.fixdep parses every source file and all headers included from it,searching for words prefixed with "CONFIG_". Then, fixdep findsCONFIG_CC_VERSION_TEXT in include/config/kconfig.h and addsinclude/config/cc/version/text.h into every .*.cmd file.When the compiler is updated, syncconfig is invoked because init/Kconfigcontains the reference to the environment variable CC_VERTION_TEXT.CONFIG_CC_VERSION_TEXT is updated to the new version string, andinclude/config/cc/version/text.h is touched.In the next rebuild, Make will rebuild every files since the timestampof include/config/cc/version/text.h is newer than that of target.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/Kconfig

cd238eff - docs: kbuild: convert docs to ReST and rename to *.rst

Wed, 12 Jun 2019 17:52:48 +0000

docs: kbuild: convert docs to ReST and rename to *.rstThe kbuild documentation clearly shows that the documentsthere are written at different times: some use markdown,some use their own peculiar logic to split sections.Convert everything to ReST without affecting too muchthe author's style and avoiding adding uneeded markups.The conversion is actually: - add blank lines and identation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups.At its new index.rst, let's add a :orphan: while this is not linked tothe main index.rst file, in order to avoid build warnings.Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jonathan Corbet List of files: /linux-6.15/Kconfig

b1663d7e - docs: Kbuild/Makefile: allow check for missing docs at build time

Tue, 04 Jun 2019 12:26:27 +0000

docs: Kbuild/Makefile: allow check for missing docs at build timeWhile this doesn't make sense for production Kernels, in order toavoid regressions when documents are touched, let's add acheck target at the make file.Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jonathan Corbet List of files: /linux-6.15/Kconfig

006477f4 - kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt

Tue, 31 Jul 2018 11:39:34 +0000

kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmtNo need to have this in the top-level Kconfig.Signed-off-by: Christoph Hellwig Tested-by: Randy Dunlap Acked-by: Randy Dunlap Signed-off-by: Masahiro Yamada List of files: /linux-6.15/Kconfig

06ec64b8 - Kconfig: consolidate the "Kernel hacking" menu

Tue, 31 Jul 2018 11:39:31 +0000

Kconfig: consolidate the "Kernel hacking" menuMove the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug tothe top-level Kconfig. For two architectures that means moving theirarch-specific symbols in that menu into a new arch Kconfig.debug file,and for a few more creating a dummy file so that we can include itunconditionally.Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, whereit belongs.Signed-off-by: Christoph Hellwig Signed-off-by: Masahiro Yamada List of files: /linux-6.15/Kconfig

1572497c - kconfig: include common Kconfig files from top-level Kconfig

Tue, 31 Jul 2018 11:39:30 +0000

kconfig: include common Kconfig files from top-level KconfigInstead of duplicating the source statements in every architecture justdo it once in the toplevel Kconfig file.Note that with this the inclusion of arch/$(SRCARCH/Kconfig moves out ofthe top-level Kconfig into arch/Kconfig so that don't violate orderingconstraits while keeping a sensible menu structure.Signed-off-by: Christoph Hellwig Signed-off-by: Masahiro Yamada List of files: /linux-6.15/Kconfig

e1cfdc0e - kconfig: add basic helper macros to scripts/Kconfig.include

Mon, 28 May 2018 09:21:59 +0000

kconfig: add basic helper macros to scripts/Kconfig.includeKconfig got text processing tools like we see in Make. Add Kconfighelper macros to scripts/Kconfig.include like we collect Makefilemacros in scripts/Kbuild.include.Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook Reviewed-by: Ulf Magnusson List of files: /linux-6.15/Kconfig

21c54b77 - kconfig: show compiler version text in the top comment

Mon, 28 May 2018 09:21:58 +0000

kconfig: show compiler version text in the top commentThe kernel configuration phase is now tightly coupled with the compilerin use. It will be nice to show the compiler information in Kconfig.The compiler information will be displayed like this: $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- config scripts/kconfig/conf --oldaskconfig Kconfig * * Linux/arm64 4.16.0-rc1 Kernel Configuration * * * Compiler: aarch64-linux-gnu-gcc (Linaro GCC 7.2-2017.11) 7.2.1 20171011 * * * General setup * Compile also drivers which will not load (COMPILE_TEST) [N/y/?]If you use GUI methods such as menuconfig, it will be displayed in thetop menu.This is simply implemented by using the 'comment' statement. So, itwill be saved into the .config file as well.This commit has a very important meaning. If the compiler is upgraded,Kconfig must be re-run since different compilers have different setsof supported options.All referenced environments are written to include/config/auto.conf.cmdso that any environment change triggers syncconfig, and prompt the userto input new values if needed.With this commit, something like follows will be added toinclude/config/auto.conf.cmd ifneq "$(CC_VERSION_TEXT)" "aarch64-linux-gnu-gcc (Linaro GCC 7.2-2017.11) 7.2.1 20171011" include/config/auto.conf: FORCE endifSigned-off-by: Masahiro Yamada Reviewed-by: Kees Cook List of files: /linux-6.15/Kconfig

104daea1 - kconfig: reference environment variables directly and remove 'option env='

Mon, 28 May 2018 09:21:40 +0000

kconfig: reference environment variables directly and remove 'option env='To get access to environment variables, Kconfig needs to define asymbol using "option env=" syntax. It is tedious to add a symbol entryfor each environment variable given that we need to define much moresuch as 'CC', 'AS', 'srctree' etc. to evaluate the compiler capabilityin Kconfig.Adding '$' for symbol references is grammatically inconsistent.Looking at the code, the symbols prefixed with 'S' are expanded by: - conf_expand_value() This is used to expand 'arch/$ARCH/defconfig' and 'defconfig_list' - sym_expand_string_value() This is used to expand strings in 'source' and 'mainmenu'All of them are fixed values independent of user configuration. So,they can be changed into the direct expansion instead of symbols.This change makes the code much cleaner. The bounce symbols 'SRCARCH','ARCH', 'SUBARCH', 'KERNELVERSION' are gone.sym_init() hard-coding 'UNAME_RELEASE' is also gone. 'UNAME_RELEASE'should be replaced with an environment variable.ARCH_DEFCONFIG is a normal symbol, so it should be simply referencedwithout '$' prefix.The new syntax is addicted by Make. The variable reference needsparentheses, like $(FOO), but you can omit them for single-lettervariables, like $F. Yet, in Makefiles, people tend to use theparenthetical form for consistency / clarification.At this moment, only the environment variable is supported, but I willextend the concept of 'variable' later on.The variables are expanded in the lexer so we can simplify the tokenhandling on the parser side.For example, the following code works.[Example code] config MY_TOOLCHAIN_LIST string default "My tools: CC=$(CC), AS=$(AS), CPP=$(CPP)"[Result] $ make -s alldefconfig && tail -n 1 .config CONFIG_MY_TOOLCHAIN_LIST="My tools: CC=gcc, AS=as, CPP=gcc -E"Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook List of files: /linux-6.15/Kconfig

b2441318 - License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Wed, 01 Nov 2017 14:07:57 +0000

License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseMany source files in the tree are missing licensing information, whichmakes it harder for compliance tools to determine the correct license.By default all files without license information are under the defaultlicense of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'SPDX license identifier. The SPDX identifier is a legally bindingshorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart andPhilippe Ombredanne.How this work was done:Patches were generated and checked against linux-4.14-rc6 for a subset ofthe use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up caseswhere non-standard license headers were used, and references to licensehad to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied toa file was done in a spreadsheet of side by side results from of theoutput of two independent scanners (ScanCode & Windriver) producing SPDXtag:value files created by Philippe Ombredanne. Philippe prepared thebase worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 filesassessed. Kate Stewart did a file by file comparison of the scannerresults in the spreadsheet to determine which SPDX license identifier(s)to be applied to the file. She confirmed any determination that was notimmediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines).All documentation files were explicitly excluded.The following heuristics were used to determine which SPDX licenseidentifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time.In total, over 70 hours of logged manual review was done on thespreadsheet to determine the SPDX license identifiers to apply to thesource files by Kate, Philippe, Thomas and, in some cases, confirmationby lawyers working with the Linux Foundation.Kate also obtained a third independent scan of the 4.13 code base fromFOSSology, and compared selected files where the other two scannersdisagreed against that SPDX file, to see if there was new insights. TheWindriver scanner is based on an older version of FOSSology in part, sothey are related.Thomas did random spot checks in about 500 files from the spreadsheetsfor the uapi headers and agreed with SPDX license identifier in thefiles he inspected. For the non-uapi files Thomas did random spot checksin about 15000 files.In initial set of patches against 4.14-rc6, 3 files were found to havecopy/paste license identifier errors, and have been fixed to reflect thecorrect identifier.Additionally Philippe spent 10 hours this week doing a detailed manualinspection and review of the 12,461 patched files from the initial patchversion early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correctThis produced a worksheet with 20 files needing minor correction. Thisworksheet was then exported into 3 different .csv files for thedifferent types of files to be modified.These .csv files were then reviewed by Greg. Thomas wrote a script toparse the csv files and add the proper SPDX tag to the file, in theformat that the file expected. This script was further refined by Gregbased on the output to detect more types of files automatically and todistinguish between header and source .c files (which need differentcomment types.) Finally Greg ran the script using the .csv files togenerate the patches.Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/Kconfig

838a2e55 - kbuild: migrate all arch to the kconfig mainmenu upgrade

Sat, 04 Sep 2010 21:10:20 +0000

kbuild: migrate all arch to the kconfig mainmenu upgradeSigned-off-by: Arnaud Lacombe Reviewed-by: Sam Ravnborg Reviewed-by: Michal Marek List of files: /linux-6.15/Kconfig