summaryrefslogtreecommitdiff
path: root/Documentation/process/coding-style.rst
AgeCommit message (Collapse)Author
2020-08-04Merge tag 'docs-5.9' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation updates from Jonathan Corbet: "It's been a busy cycle for documentation - hopefully the busiest for a while to come. Changes include: - Some new Chinese translations - Progress on the battle against double words words and non-HTTPS URLs - Some block-mq documentation - More RST conversions from Mauro. At this point, that task is essentially complete, so we shouldn't see this kind of churn again for a while. Unless we decide to switch to asciidoc or something...:) - Lots of typo fixes, warning fixes, and more" * tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits) scripts/kernel-doc: optionally treat warnings as errors docs: ia64: correct typo mailmap: add entry for <alobakin@marvell.com> doc/zh_CN: add cpu-load Chinese version Documentation/admin-guide: tainted-kernels: fix spelling mistake MAINTAINERS: adjust kprobes.rst entry to new location devices.txt: document rfkill allocation PCI: correct flag name docs: filesystems: vfs: correct flag name docs: filesystems: vfs: correct sync_mode flag names docs: path-lookup: markup fixes for emphasis docs: path-lookup: more markup fixes docs: path-lookup: fix HTML entity mojibake CREDITS: Replace HTTP links with HTTPS ones docs: process: Add an example for creating a fixes tag doc/zh_CN: add Chinese translation prefer section doc/zh_CN: add clearing-warn-once Chinese version doc/zh_CN: add admin-guide index doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label futex: MAINTAINERS: Re-add selftests directory ...
2020-07-03CodingStyle: Inclusive TerminologyDan Williams
Linux maintains a coding-style and its own idiomatic set of terminology. Update the style guidelines to recommend replacements for the terms master/slave and blacklist/whitelist. Link: http://lore.kernel.org/r/159389297140.2210796.13590142254668787525.stgit@dwillia2-desk3.amr.corp.intel.com Acked-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Dave Airlie <airlied@redhat.com> Acked-by: SeongJae Park <sjpark@amazon.de> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Laura Abbott <laura@labbott.name> Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Chris Mason <clm@fb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2020-06-26Replace HTTP links with HTTPS ones: Documentation/processAlexander A. Klimov
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Link: https://lore.kernel.org/r/20200621133630.46435-1-grandmaster@al2klimov.de Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-06-10Documentation/CodingStyle: Fix duplicate "are" typoGeert Uytterhoeven
The improved paragraph about line lengths contains a sentence with a duplicate word: there is one "are" at the end of a line, followed by a second one at the beginning of the next line. Drop the first one, as that one is part of the longest line. Fixes: bdc48fa11e46f867 ("checkpatch/coding-style: deprecate 80-column warning") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-31checkpatch/coding-style: deprecate 80-column warningJoe Perches
Yes, staying withing 80 columns is certainly still _preferred_. But it's not the hard limit that the checkpatch warnings imply, and other concerns can most certainly dominate. Increase the default limit to 100 characters. Not because 100 characters is some hard limit either, but that's certainly a "what are you doing" kind of value and less likely to be about the occasional slightly longer lines. Miscellanea: - to avoid unnecessary whitespace changes in files, checkpatch will no longer emit a warning about line length when scanning files unless --strict is also used - Add a bit to coding-style about alignment to open parenthesis Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-19Documentation: bring process docs up to dateTony Fischetti
The guide to the kernel dev process documentation, for example, contains references to older kernels and their timelines. In addition, one of the "long term support kernels" listed have since reached EOL, and a new one has been named. This patch brings information/tables up to date. Additionally, some very trivial grammatical errors, unclear sentences, and potentially unsavory diction have been edited. Signed-off-by: Tony Fischetti <tony.fischetti@gmail.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-12-09treewide: Use sizeof_field() macroPankaj Bharadiya
Replace all the occurrences of FIELD_SIZEOF() with sizeof_field() except at places where these are defined. Later patches will remove the unused definition of FIELD_SIZEOF(). This patch is generated using following script: EXCLUDE_FILES="include/linux/stddef.h|include/linux/kernel.h" git grep -l -e "\bFIELD_SIZEOF\b" | while read file; do if [[ "$file" =~ $EXCLUDE_FILES ]]; then continue fi sed -i -e 's/\bFIELD_SIZEOF\b/sizeof_field/g' $file; done Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com> Link: https://lore.kernel.org/r/20190924105839.110713-3-pankaj.laxminarayan.bharadiya@intel.com Co-developed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: David Miller <davem@davemloft.net> # for net
2019-10-11Documentation/process: Add fallthrough pseudo-keywordJoe Perches
Describe the fallthrough pseudo-keyword. Convert the coding-style.rst example to the keyword style. Add description and links to deprecated.rst. Miguel Ojeda comments on the eventual [[fallthrough]] syntax: "Note that C17/C18 does not have [[fallthrough]]. C++17 introduced it, as it is mentioned above. I would keep the __attribute__((fallthrough)) -> [[fallthrough]] change you did, though, since that is indeed the standard syntax (given the paragraph references C++17). I was told by Aaron Ballman (who is proposing them for C) that it is more or less likely that it becomes standardized in C2x. However, it is still not added to the draft (other attributes are already, though). See N2268 and N2269: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2268.pdf (fallthrough) http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2269.pdf (attributes in general)" Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-14docs: kbuild: convert docs to ReST and rename to *.rstMauro Carvalho Chehab
The kbuild documentation clearly shows that the documents there are written at different times: some use markdown, some use their own peculiar logic to split sections. Convert everything to ReST without affecting too much the 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 to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-04-01coding-style.rst: Generic alloc functions do not need OOM loggingJoe Perches
Generic allocation functions already emit a dump_stack() so additional error logging isn't useful. Document it as such and add a reference to the allocation API. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-01-20coding-style: Clarify the expectations around boolJason Gunthorpe
There has been some confusion since checkpatch started warning about bool use in structures, and people have been avoiding using it. Many people feel there is still a legitimate place for bool in structures, so provide some guidance on bool usage derived from the entire thread that spawned the checkpatch warning. Link: https://lkml.kernel.org/r/CA+55aFwVZk1OfB9T2v014PTAKFhtVan_Zj2dOjnCy3x6E4UJfA@mail.gmail.com Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Joe Perches <joe@perches.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Acked-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Joey Pabalinas <joeypabalinas@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-01-14Documentation: fix coding-style.rst Sphinx warningRandy Dunlap
Fix Sphinx warning in coding-style.rst: Documentation/process/coding-style.rst:446: WARNING: Inline interpreted text or phrase reference start-string without end-string. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-01-07Documentation/CodingStyle: Use directory-local variables for emacs settingsBart Van Assche
In emacs 23.1 support for directory-local variables was added (see also https://lists.gnu.org/archive/html/info-gnu-emacs/2009-07/msg00000.html). Simplify the settings in coding-style.rst by using that feature. Additionally, do not inherit any settings from emacs' linux coding style to minimize dependencies on the version of emacs that is being used. I have verified with several large and nontrivial kernel source files that the new settings format code according to what checkpatch expects. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Alison Chaiken <alison@she-devel.com> Cc: Joe Perches <joe@perches.com> Cc: Federico Vaga <federico.vaga@vaga.pv.it> Cc: Geyslan G. Bem <geyslan@gmail.com> Cc: Tiago Natel de Moura <tiago4orion@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-01-04Documentation/process/coding-style.rst: don't use "extern" with function ↵Alexey Dobriyan
prototypes `extern' with function prototypes makes lines longer and creates more characters on the screen. Do not bug people with checkpatch.pl warnings for now as fallout can be devastating. Link: http://lkml.kernel.org/r/20181101134153.GA29267@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-06doc:process: add links where missingFederico Vaga
Some documents are refering to others without links. With this patch I add those missing links. This patch affects only documents under process/ and labels where necessary. Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-04-11clang-format: add configuration fileMiguel Ojeda
clang-format is a tool to format C/C++/... code according to a set of rules and heuristics. Like most tools, it is not perfect nor covers every single case, but it is good enough to be helpful. In particular, it is useful for quickly re-formatting blocks of code automatically, for reviewing full files in order to spot coding style mistakes, typos and possible improvements. It is also handy for sorting ``#includes``, for aligning variables and macros, for reflowing text and other similar tasks. It also serves as a teaching tool/guide for newcomers. The tool itself has been already included in the repositories of popular Linux distributions for a long time. The rules in this file are intended for clang-format >= 4, which is easily available in most distributions. This commit adds the configuration file that contains the rules that the tool uses to know how to format the code according to the kernel coding style. This gives us several advantages: * clang-format works out of the box with reasonable defaults; avoiding that everyone has to re-do the configuration. * Everyone agrees (eventually) on what is the most useful default configuration for most of the kernel. * If it becomes commonplace among kernel developers, clang-format may feel compelled to support us better. They already recognize the Linux kernel and its style in their documentation and in one of the style sub-options. Some of clang-format's features relevant for the kernel are: * Uses clang's tooling support behind the scenes to parse and rewrite the code. It is not based on ad-hoc regexps. * Supports reasonably well the Linux kernel coding style. * Fast enough to be used at the press of a key. * There are already integrations (either built-in or third-party) for many common editors used by kernel developers (e.g. vim, emacs, Sublime, Atom...) that allow you to format an entire file or, more usefully, just your selection. * Able to parse unified diffs -- you can, for instance, reformat only the lines changed by a git commit. * Able to reflow text comments as well. * Widely supported and used by hundreds of developers in highly complex projects and organizations (e.g. the LLVM project itself, Chromium, WebKit, Google, Mozilla...). Therefore, it will be supported for a long time. See more information about the tool at: https://clang.llvm.org/docs/ClangFormat.html https://clang.llvm.org/docs/ClangFormatStyleOptions.html Link: http://lkml.kernel.org/r/20180318171632.qfkemw3mwbcukth6@gmail.com Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-21Documentation/CodingStyle: Add an example for bracesGary R Hook
Add another example of required braces when using a compound statement in a loop. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-06-05Doc: fix a markup error in coding-style.rstAyan Shafqat
The "\n\t" sequence needs to be quoted or it will not render properly. [jc: no signoff from the author, but it's trivial] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-19docs-rst: doc-guide: split the kernel-documentation.rst contentsMauro Carvalho Chehab
Having the kernel-documentation at the topmost level doesn't allow generating a separate PDF file for it. Also, makes harder to add extra contents. So, place it on a sub-dir. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-07coding-style: fix mismatch of jump label nameMasahiro Yamada
Commit 865a1caa4b6b ("CodingStyle: Clarify and complete chapter 7") renamed the label "out_buffer" to "out_free_buffer", but missed to change this line. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-10-24docs: fix locations of several documents that got movedMauro Carvalho Chehab
The previous patch renamed several files that are cross-referenced along the Kernel documentation. Adjust the links to point to the right places. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-10-24docs-rst: add documents to development-processMauro Carvalho Chehab
Add several documents to the development-process ReST book. As we don't want renames, use symlinks instead, keeping those documents on their original place. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>