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2023-04-10docs: Move arc architecture docs under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/arc into arch/ and fix all in-tree references. Acked-by: Vineet Gupta <vgupta@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move nios2 documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/nios2 into arch/ and fix all in-tree references. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move openrisc documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/openrisc into arch/ and fix all in-tree references. Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Acked-by: Alex Shi <alexs@kernel.org> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move superh documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/sh into arch/ and fix all in-tree references. Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move sparc documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/sparc into arch/ and fix all in-tree references. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move xtensa documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/xtensa into arch/ and fix all in-tree references. Cc: Chris Zankel <chris@zankel.net> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: zh_CN: create the architecture-specific top-level directoryJonathan Corbet
This mirrors commit 4f1bb0386dfc ("docs: create a top-level arch/ directory"), creating a top-level directory to hold architecture-specific documentation. Acked-by: Alex Shi <alexs@kernel.org> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-30docs: move x86 documentation into Documentation/arch/Jonathan Corbet
Move the x86 documentation under Documentation/arch/ as a way of cleaning up the top-level directory and making the structure of our docs more closely match the structure of the source directories it describes. All in-kernel references to the old paths have been updated. Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-arch@vger.kernel.org Cc: x86@kernel.org Cc: Borislav Petkov <bp@alien8.de> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/lkml/20230315211523.108836-1-corbet@lwn.net/ Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-29Documentation: kernel-parameters: Remove meye entryBagas Sanjaya
Commit ba47652ba65523 ("media: meye: remove this deprecated driver") removes meye driver but forgets to purge its kernel-parameters.txt entry, hence broken reference. Remove the entry. Link: https://lore.kernel.org/all/202302070341.OVqstpMM-lkp@intel.com/ Fixes: ba47652ba655 ("media: meye: remove this deprecated driver") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20230315100246.62324-1-bagasdotme@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-29doc:it_IT: translation alignmentFederico Vaga
Italian translation updated following these changes: commit 901578a45950 ("docs: recommend using Link: whenever using Reported-by:")" commit 775a445d9a63 ("coding-style: fix title of Greg K-H's talk") commit 1d2ed9234c85 ("Documentation: process: Document suitability of Proton Mail for kernel development") commit 9d0f5cd16744 ("docs: promote the title of process/index.rst") commit d4563201f33a ("Documentation: simplify and clarify DCO contribution example language") commit e7b4311ebcac ("Replace HTTP links with HTTPS ones: Documentation/process") commit 0b02076f9953 ("docs: programming-language: add Rust programming language section") commit 38484a1d0c50 ("docs: programming-language: remove mention of the Intel compiler") commit b8885e2615f4 ("Documentation: front page: use recommended heading adornments") Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20230326130213.28755-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-29docs/sp_SP: Remove ZERO WIDTH SPACE in memory-barriers.txtAkira Yokosawa
As this file is included literally, ZERO WIDTH SPACE causes "make pdfdocs" to emit messages which read: Missing character: There is no ​ (U+200B) in font DejaVu Sans Mono/OT:script=latn;language=dflt;! Missing character: There is no ​ (U+200B) in font DejaVu Sans Mono/OT:script=latn;language=dflt;! U+200B (ZERO WIDTH SPADE) has no effect in literal blocks. Remove them and get rid of those noises. Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Acked-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/c38176c7-c30a-4c2c-3516-8d3be1c267dc@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23docs: create a top-level arch/ directoryJonathan Corbet
As the first step in bringing some order to our architecture-specific documentation, create a top-level arch/ directory and move arch.rst as its index.rst file. There is no change in the rendered docs at this point. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23docs: describe how to quickly build a trimmed kernelThorsten Leemhuis
Add a text explaining how to quickly build a kernel, as that's something users will often have to do when they want to report an issue or test proposed fixes. This is a huge and frightening task for quite a few users these days, as many rely on pre-compiled kernels and have never built their own. They find help on quite a few websites explaining the process in various ways, but those howtos often omit important details or make things too hard for the 'quickly build just for testing' case that 'localmodconfig' is really useful for. Hence give users something at hand to guide them, as that makes it easier for them to help with testing, debugging, and fixing the kernel. To keep the complexity at bay, the document explicitly focuses on how to compile the kernel on commodity distributions running on commodity hardware. People that deal with less common distributions or hardware will often know their way around already anyway. The text describes a few oddities of Arch and Debian that were found by the author and a few volunteers that tested the described procedure. There are likely more such quirks that need to be covered as well as a few things the author will have missed -- but one has to start somewhere. The document heavily uses anchors and links to them, which makes things slightly harder to read in the source form. But the intended target audience is way more likely to read rendered versions of this text on pages like docs.kernel.org anyway -- and there those anchors and links allow easy jumps to the reference section and back, which makes the document a lot easier to work with for the intended target audience. Aspects relevant for bisection were left out on purpose, as that is a related, but in the end different use case. The rough plan is to have a second document with a similar style to cover bisection. The idea is to reuse a few bits from this document and link quite often to entries in the reference section with the help of the anchors in this text. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/1a788a8e7ba8a2063df08668f565efa832016032.1678021408.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23coding-style: fix title of Greg K-H's talkJakub Wilk
The talk title was inadvertently mangled in 8c27ceff3604 ("docs: fix locations of several documents that got moved"). Signed-off-by: Jakub Wilk <jwilk@jwilk.net> Link: https://lore.kernel.org/r/20230322215311.6579-1-jwilk@jwilk.net Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23Documentation/x86: Update split lock documentationTony Luck
commit b041b525dab9 ("x86/split_lock: Make life miserable for split lockers") added a delay and serialization of split locks. Commit 727209376f49 ("x86/split_lock: Add sysctl to control the misery mode") provided a sysctl to turn off the misery. Update the split lock documentation to describe the current state of the code. Signed-off-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20230315225722.104607-1-tony.luck@intel.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23docs/zh_CN: fix a wrong formatZang Leigang
Add a missing markup for the code snippet at the end of lru_sort.rst Signed-off-by: Zang Leigang <zangleigang@hisilicon.com> Reviewed-by: Alex Shi <alexs@kernel.org> Link: https://lore.kernel.org/r/20230316024519.27992-1-zangleigang@hisilicon.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23Documentation: kernel-parameters: sort all "no..." parametersRandy Dunlap
Sort all of the "no..." kernel parameters into the correct order as specified in kernel-parameters.rst: "into English Dictionary order (defined as ignoring all punctuation and sorting digits before letters in a case insensitive manner)". No other changes here, just movement of lines. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20230317002635.16540-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23doc:it_IT: translation alignmentFederico Vaga
Major update for maintainer-pgp-guide commit e4412739472b ("Documentation: raise minimum supported version of binutils to 2.25") commit 67fe6792a7fb ("Documentation: stable: Document alternative for referring upstream commit hash") commit 8763a30bc15b ("docs: deprecated.rst: Add note about DECLARE_FLEX_ARRAY() usage commit 2f993509a97e ("docs: process/5.Posting.rst: clarify use of Reported-by: tag") commit a31323bef2b6 ("timers: Update the documentation to reflect on the new timer_shutdown() API") Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20230319134624.21327-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-23Documentation: maintainer-tip: Rectify link to "Describe your changes" ↵Bagas Sanjaya
section of submitting-patches.rst The general changelog rules for the tip tree refers to "Describe your changes" section of submitting patches guide. However, the internal link reference targets to non-existent "submittingpatches" label, which brings reader to the top of the linked doc. Correct the target. No changes to submitting-patches.rst since the required label is already there. Fixes: 31c9d7c8297558 ("Documentation/process: Add tip tree handbook") Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20230320124327.174881-1-bagasdotme@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs/mm: Physical Memory: add example of interleaving nodesMike Rapoport (IBM)
Add an example of memory layout with interleaving nodes where even memory banks belong to node 0 and odd memory banks belong to node 1 Suggested-by: Michal Hocko <mhocko@kernel.org> Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20230213154447.1631847-1-rppt@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14qnx4: credit contributors in CREDITSLukas Bulwahn
Replace the content of the qnx4 README file with the canonical place for such information. Add the credits of the qnx4 contribution to CREDITS. As there is already a QNX4 FILESYSTEM section in MAINTAINERS, it is clear who to contact and send patches to. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-By: Anders Larsen <al@alarsen.net> Link: https://lore.kernel.org/r/20230220170210.15677-3-lukas.bulwahn@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14qnx6: credit contributor and mark filesystem orphanLukas Bulwahn
Replace the content of the qnx6 README file with the canonical places for such information. Add the credits of the qnx6 contribution to CREDITS, and add an section in MAINTAINERS to mark this filesystem as Orphan, as the domain ontika.net and email address does not resolve to an IP address anymore. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20230220170210.15677-2-lukas.bulwahn@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: Add relevant kernel publications to list of booksCarlos Bilbao
For the list of kernel published books, include publication covering kernel debugging from August, 2022 (ISBN 978-1801075039) and one from March, 2021 on the topic of char device drivers and kernel synchronization (ISBN 978-1801079518). Also add foundational book from Robert Love (ISBN 978-1449339531) and remove extra spaces. Co-developed-by: Kaiwan N Billimoria <kaiwan.billimoria@gmail.com> Signed-off-by: Kaiwan N Billimoria <kaiwan.billimoria@gmail.com> Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/20230222183445.3127324-1-carlos.bilbao@amd.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14Documentation: kernel-parameters: sort NFS parametersRandy Dunlap
Sort the NFS kernel command line parameters. This is done in 4 groups so as to not have them intermingled: 'nfs' module parameters, 'nfs4' module parameters, 'nfsd' module parameters, and nfs "global" (__setup, no module) parameters. There were 5 parameters which were listed with a space between the parameter name and the following '=' sign. The space has been removed since module parameters expect 'parameter=' with no intervening space. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Anna Schumaker <anna@kernel.org> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Jeff Layton <jlayton@kernel.org> Cc: linux-nfs@vger.kernel.org Link: https://lore.kernel.org/r/20230227025816.1083-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: admin: unicode: update information on state of lanana.org documentLukas Bulwahn
Replace link to a non-existing page with a note that lanana.org does not maintain Linux Zone Unicode Assignments anymore. Remove the reference to H. Peter Anvin and the unicode lanana.org email as the maintainer of this file, as at this point, this is all maintained by the general kernel community. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20230307144000.29539-3-lukas.bulwahn@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14MAINTAINERS: remove historic section DEVICE NUMBER REGISTRYLukas Bulwahn
As described in Documentation/admin-guide/devices.rst, the device number registry (or linux device list) is at Documentation/admin-guide/devices.txt and no longer maintained at lanana.org. The devices.txt file is basically community-maintained, and there is no other dedicated maintainer or contact for that file nowadays. Remove the historic section DEVICE NUMBER REGISTRY in MAINTAINERS. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20230307144000.29539-2-lukas.bulwahn@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14Documentation/process: Add Linux Kernel Contribution Maturity ModelTheodore Ts'o
As a follow-up to a discussion at the 2021 Maintainer's Summit on the topic of maintainer recruitment and retention, the TAB took on the task of creating a document which to help companies and other organizations to grow in their ability to engage with the Linux Kernel development community, using the Maturity Model[2] framework. The goal is to encourage, in a management-friendly way, companies to allow their engineers to contribute with the upstream Linux Kernel development community, so we can grow the "talent pipeline" for contributors to become respected leaders, and eventually kernel maintainers. [1] https://lwn.net/Articles/870581/ [2] https://en.wikipedia.org/wiki/Maturity_model Signed-off-by: Theodore Ts'o <tytso@mit.edu> Co-developed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Co-developed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Jonathan Corbet <corbet@lwn.net> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20230308190403.2157046-1-tytso@mit.edu Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs/sp_SP: Add translation of process/deprecatedCarlos Bilbao
Translate Documentation/process/deprecated.rst into Spanish. Co-developed-by: Sergio Gonzalez <sergio.collado@gmail.com> Signed-off-by: Sergio Gonzalez <sergio.collado@gmail.com> Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/20230310163651.2500175-1-carlos.bilbao@amd.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: filesystems: vfs: actualize struct super_operations descriptionAlexander Mikhalitsyn
Added/updated descriptions for super_operations: - free_inode method - evict_inode method - freeze_super/thaw_super method - show_{devname,path,stats} procfs-related methods - get_dquots method Cc: Eric Biggers <ebiggers@kernel.org> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: linux-fsdevel@vger.kernel.org Cc: linux-doc@vger.kernel.org Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> Reviewed-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20230313130718.253708-3-aleksandr.mikhalitsyn@canonical.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: filesystems: vfs: actualize struct file_system_type descriptionAlexander Mikhalitsyn
Added descriptions for: - fscontext API ('init_fs_context' method, 'parameters' field) - 'fs_supers' field Cc: Eric Biggers <ebiggers@kernel.org> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: linux-fsdevel@vger.kernel.org Cc: linux-doc@vger.kernel.org Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> Reviewed-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20230313130718.253708-2-aleksandr.mikhalitsyn@canonical.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14Documentation: fs/proc: corrections and updateRandy Dunlap
Update URL for the latest online version of this document. Correct "files" to "fields" in a few places. Update /proc/scsi, /proc/stat, and /proc/fs/ext4 information. Drop /usr/src/ from the location of the kernel source tree. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20230314060347.605-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: vfio: fix header pathJiri Pirko
The text points to a different header file, fix by changing the path to "uapi". Signed-off-by: Jiri Pirko <jiri@nvidia.com> Reviewed-by: Yi Liu <yi.l.liu@intel.com> Link: https://lore.kernel.org/r/20230310095857.985814-1-jiri@resnulli.us Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-14docs: process: typo fixXujun Leng
In the second paragraph of section "Respond to review comments", there is a spelling mistake: "aganst" should be "against". Signed-off-by: Xujun Leng <lengxujun2007@126.com> Link: https://lore.kernel.org/r/20230312071423.3042-1-lengxujun2007@126.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs/mm: hugetlbfs_reserv: fix a reference to a file that doesn't existMike Rapoport (IBM)
kbuild reports: >> Warning: Documentation/mm/hugetlbfs_reserv.rst references a file that doesn't exist: Documentation/mm/hugetlbpage.rst >> Warning: Documentation/translations/zh_CN/mm/hugetlbfs_reserv.rst references a file that doesn't exist: Documentation/mm/hugetlbpage.rst Fix the filename to be 'Documentation/admin-guide/mm/hugetlbpage.rst'. Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202302231854.sKlCmx9K-lkp@intel.com/ Fixes: ee86588960e2 ("docs/mm: remove useless markup") Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Link: https://lore.kernel.org/r/20230224100306.2287696-2-rppt@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs/mm: Physical Memory: fix a reference to a file that doesn't existMike Rapoport (IBM)
kbuild reports: >> Warning: Documentation/mm/physical_memory.rst references a file that doesn't exist: Documentation/admin-guide/mm/memory_hotplug.rst Fix the filename to be 'Documentation/admin-guide/mm/memory-hotplug.rst'. Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202302231311.567PAoS2-lkp@intel.com/ Fixes: 353c7dd636ed ("docs/mm: Physical Memory: remove useless markup") Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Link: https://lore.kernel.org/r/20230224100306.2287696-1-rppt@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs: rebasing-and-merging: Drop wrong statement about gitUwe Kleine-König
The "^0" syntax is no longer needed to fast-forward to a mainline commit; take that out and add --ff-only to force an error if fast-forward is not possible. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> [jc: rewrote changelog] Link: https://lore.kernel.org/r/20230228134657.1797871-1-u.kleine-koenig@pengutronix.de Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs: programming-language: add Rust programming language sectionMiguel Ojeda
Following the C text in the file, add a mention about the Rust programming language, the currently supported compiler and the edition used (similar to the "dialect" mention for C). Similarly, add a mention about the unstable features used (similar to the "extensions" mentions for C). In addition, add some links to complement the information. Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20230306191712.230658-2-ojeda@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs: programming-language: remove mention of the Intel compilerMiguel Ojeda
The Intel compiler support has been removed in commit 95207db8166a ("Remove Intel compiler support"). Thus remove its mention in the Documentation too. Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/r/20230306191712.230658-1-ojeda@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07docs: Correct missing "d_" prefix for dentry_operations member d_weak_revalidateGlenn Washburn
The details for struct dentry_operations member d_weak_revalidate is missing a "d_" prefix. Fixes: af96c1e304f7 ("docs: filesystems: vfs: Convert vfs.txt to RST") Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Link: https://lore.kernel.org/r/20230227184042.2375235-1-development@efficientek.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-07sched/doc: supplement CPU capacity with RISC-VSong Shuai
This commit 7d2078310cbf ("dt-bindings: arm: move cpu-capacity to a shared loation") updates some references about capacity-dmips-mhz property in this document. The list of architectures using capacity-dmips-mhz omits RISC-V, so supplements it here. Signed-off-by: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> # English Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Reviewed-by: Alex Shi <alexs@kernel.org> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230227105941.2749193-1-suagrfillet@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-03-05Linux 6.3-rc1v6.3-rc1Linus Torvalds
2023-03-05cpumask: re-introduce constant-sized cpumask optimizationsLinus Torvalds
Commit aa47a7c215e7 ("lib/cpumask: deprecate nr_cpumask_bits") resulted in the cpumask operations potentially becoming hugely less efficient, because suddenly the cpumask was always considered to be variable-sized. The optimization was then later added back in a limited form by commit 6f9c07be9d02 ("lib/cpumask: add FORCE_NR_CPUS config option"), but that FORCE_NR_CPUS option is not useful in a generic kernel and more of a special case for embedded situations with fixed hardware. Instead, just re-introduce the optimization, with some changes. Instead of depending on CPUMASK_OFFSTACK being false, and then always using the full constant cpumask width, this introduces three different cpumask "sizes": - the exact size (nr_cpumask_bits) remains identical to nr_cpu_ids. This is used for situations where we should use the exact size. - the "small" size (small_cpumask_bits) is the NR_CPUS constant if it fits in a single word and the bitmap operations thus end up able to trigger the "small_const_nbits()" optimizations. This is used for the operations that have optimized single-word cases that get inlined, notably the bit find and scanning functions. - the "large" size (large_cpumask_bits) is the NR_CPUS constant if it is an sufficiently small constant that makes simple "copy" and "clear" operations more efficient. This is arbitrarily set at four words or less. As a an example of this situation, without this fixed size optimization, cpumask_clear() will generate code like movl nr_cpu_ids(%rip), %edx addq $63, %rdx shrq $3, %rdx andl $-8, %edx callq memset@PLT on x86-64, because it would calculate the "exact" number of longwords that need to be cleared. In contrast, with this patch, using a MAX_CPU of 64 (which is quite a reasonable value to use), the above becomes a single movq $0,cpumask instruction instead, because instead of caring to figure out exactly how many CPU's the system has, it just knows that the cpumask will be a single word and can just clear it all. Note that this does end up tightening the rules a bit from the original version in another way: operations that set bits in the cpumask are now limited to the actual nr_cpu_ids limit, whereas we used to do the nr_cpumask_bits thing almost everywhere in the cpumask code. But if you just clear bits, or scan for bits, we can use the simpler compile-time constants. In the process, remove 'cpumask_complement()' and 'for_each_cpu_not()' which were not useful, and which fundamentally have to be limited to 'nr_cpu_ids'. Better remove them now than have somebody introduce use of them later. Of course, on x86-64 with MAXSMP there is no sane small compile-time constant for the cpumask sizes, and we end up using the actual CPU bits, and will generate the above kind of horrors regardless. Please don't use MAXSMP unless you really expect to have machines with thousands of cores. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-05Merge tag 'v6.3-p2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto fix from Herbert Xu: "Fix a regression in the caam driver" * tag 'v6.3-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: caam - Fix edesc/iv ordering mixup
2023-03-05Merge tag 'x86-urgent-2023-03-05' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 updates from Thomas Gleixner: "A small set of updates for x86: - Return -EIO instead of success when the certificate buffer for SEV guests is not large enough - Allow STIPB to be enabled with legacy IBSR. Legacy IBRS is cleared on return to userspace for performance reasons, but the leaves user space vulnerable to cross-thread attacks which STIBP prevents. Update the documentation accordingly" * tag 'x86-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: virt/sev-guest: Return -EIO if certificate buffer is not large enough Documentation/hw-vuln: Document the interaction between IBRS and STIBP x86/speculation: Allow enabling STIBP with legacy IBRS
2023-03-05Merge tag 'irq-urgent-2023-03-05' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "A set of updates for the interrupt susbsystem: - Prevent possible NULL pointer derefences in irq_data_get_affinity_mask() and irq_domain_create_hierarchy() - Take the per device MSI lock before invoking code which relies on it being hold - Make sure that MSI descriptors are unreferenced before freeing them. This was overlooked when the platform MSI code was converted to use core infrastructure and results in a fals positive warning - Remove dead code in the MSI subsystem - Clarify the documentation for pci_msix_free_irq() - More kobj_type constification" * tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced genirq/msi: Drop dead domain name assignment irqdomain: Add missing NULL pointer check in irq_domain_create_hierarchy() genirq/irqdesc: Make kobj_type structures constant PCI/MSI: Clarify usage of pci_msix_free_irq() genirq/msi: Take the per-device MSI lock before validating the control structure genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()
2023-03-05Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds
Pull vfs update from Al Viro: "Adding Christian Brauner as VFS co-maintainer" * tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: Adding VFS co-maintainer
2023-03-05Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds
Pull VM_FAULT_RETRY fixes from Al Viro: "Some of the page fault handlers do not deal with the following case correctly: - handle_mm_fault() has returned VM_FAULT_RETRY - there is a pending fatal signal - fault had happened in kernel mode Correct action in such case is not "return unconditionally" - fatal signals are handled only upon return to userland and something like copy_to_user() would end up retrying the faulting instruction and triggering the same fault again and again. What we need to do in such case is to make the caller to treat that as failed uaccess attempt - handle exception if there is an exception handler for faulting instruction or oops if there isn't one. Over the years some architectures had been fixed and now are handling that case properly; some still do not. This series should fix the remaining ones. Status: - m68k, riscv, hexagon, parisc: tested/acked by maintainers. - alpha, sparc32, sparc64: tested locally - bug has been reproduced on the unpatched kernel and verified to be fixed by this series. - ia64, microblaze, nios2, openrisc: build, but otherwise completely untested" * tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: openrisc: fix livelock in uaccess nios2: fix livelock in uaccess microblaze: fix livelock in uaccess ia64: fix livelock in uaccess sparc: fix livelock in uaccess alpha: fix livelock in uaccess parisc: fix livelock in uaccess hexagon: fix livelock in uaccess riscv: fix livelock in uaccess m68k: fix livelock in uaccess
2023-03-05Remove Intel compiler supportMasahiro Yamada
include/linux/compiler-intel.h had no update in the past 3 years. We often forget about the third C compiler to build the kernel. For example, commit a0a12c3ed057 ("asm goto: eradicate CC_HAS_ASM_GOTO") only mentioned GCC and Clang. init/Kconfig defines CC_IS_GCC and CC_IS_CLANG but not CC_IS_ICC, and nobody has reported any issue. I guess the Intel Compiler support is broken, and nobody is caring about it. Harald Arnesen pointed out ICC (classic Intel C/C++ compiler) is deprecated: $ icc -v icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is deprecated and will be removed from product release in the second half of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended compiler moving forward. Please transition to use this compiler. Use '-diag-disable=10441' to disable this message. icc version 2021.7.0 (gcc version 12.1.0 compatibility) Arnd Bergmann provided a link to the article, "Intel C/C++ compilers complete adoption of LLVM". lib/zstd/common/compiler.h and lib/zstd/compress/zstd_fast.c were kept untouched for better sync with https://github.com/facebook/zstd Link: https://www.intel.com/content/www/us/en/developer/articles/technical/adoption-of-llvm-complete-icx.html Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-05Adding VFS co-maintainerAl Viro
Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-04Merge tag 'i2c-for-6.3-rc1-part2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull more i2c updates from Wolfram Sang: "Some improvements/fixes for the newly added GXP driver and a Kconfig dependency fix" * tag 'i2c-for-6.3-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: gxp: fix an error code in probe i2c: gxp: return proper error on address NACK i2c: gxp: remove "empty" switch statement i2c: Disable I2C_APPLE when I2C_PASEMI is a builtin
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