- 30 Mar, 2023 1 commit
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Jonathan Corbet authored
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>
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- 29 Mar, 2023 3 commits
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Bagas Sanjaya authored
Commit ba47652b ("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: ba47652b ("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.comSigned-off-by:
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Federico Vaga authored
Italian translation updated following these changes: commit 901578a4 ("docs: recommend using Link: whenever using Reported-by:")" commit 775a445d ("coding-style: fix title of Greg K-H's talk") commit 1d2ed923 ("Documentation: process: Document suitability of Proton Mail for kernel development") commit 9d0f5cd1 ("docs: promote the title of process/index.rst") commit d4563201 ("Documentation: simplify and clarify DCO contribution example language") commit e7b4311e ("Replace HTTP links with HTTPS ones: Documentation/process") commit 0b02076f ("docs: programming-language: add Rust programming language section") commit 38484a1d ("docs: programming-language: remove mention of the Intel compiler") commit b8885e26 ("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.itSigned-off-by:
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Akira Yokosawa authored
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.comSigned-off-by:
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- 23 Mar, 2023 8 commits
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Jonathan Corbet authored
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: -
Thorsten Leemhuis authored
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.infoSigned-off-by:
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Jakub Wilk authored
The talk title was inadvertently mangled in 8c27ceff ("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.netSigned-off-by:
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Tony Luck authored
commit b041b525 ("x86/split_lock: Make life miserable for split lockers") added a delay and serialization of split locks. Commit 72720937 ("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.comSigned-off-by:
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Zang Leigang authored
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.comSigned-off-by:
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Randy Dunlap authored
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:
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Federico Vaga authored
Major update for maintainer-pgp-guide commit e4412739 ("Documentation: raise minimum supported version of binutils to 2.25") commit 67fe6792 ("Documentation: stable: Document alternative for referring upstream commit hash") commit 8763a30b ("docs: deprecated.rst: Add note about DECLARE_FLEX_ARRAY() usage commit 2f993509 ("docs: process/5.Posting.rst: clarify use of Reported-by: tag") commit a31323be ("timers: Update the documentation to reflect on the new timer_shutdown() API") Signed-off-by:
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Bagas Sanjaya authored
Documentation: maintainer-tip: Rectify link to "Describe your changes" 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: 31c9d7c8 ("Documentation/process: Add tip tree handbook") Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20230320124327.174881-1-bagasdotme@gmail.comSigned-off-by:
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- 14 Mar, 2023 14 commits
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Mike Rapoport (IBM) authored
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.orgSigned-off-by:
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Lukas Bulwahn authored
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.comSigned-off-by:
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Lukas Bulwahn authored
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:
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Carlos Bilbao authored
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:
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Randy Dunlap authored
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:
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Lukas Bulwahn authored
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:
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Lukas Bulwahn authored
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:
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Theodore Ts'o authored
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_modelSigned-off-by:
Theodore Ts'o <tytso@mit.edu> Co-developed-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org> Acked-by:
Christian Brauner (Microsoft) <brauner@kernel.org> Acked-by:
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Carlos Bilbao authored
Translate Documentation/process/deprecated.rst into Spanish. Co-developed-by:
Sergio Gonzalez <sergio.collado@gmail.com> Signed-off-by:
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Alexander Mikhalitsyn authored
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:
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Alexander Mikhalitsyn authored
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: -
Randy Dunlap authored
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:
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Jiri Pirko authored
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.usSigned-off-by:
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Xujun Leng authored
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.comSigned-off-by:
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- 07 Mar, 2023 7 commits
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Mike Rapoport (IBM) authored
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:
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Mike Rapoport (IBM) authored
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:
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Uwe Kleine-König authored
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.deSigned-off-by:
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Miguel Ojeda authored
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.orgSigned-off-by:
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Miguel Ojeda authored
The Intel compiler support has been removed in commit 95207db8 ("Remove Intel compiler support"). Thus remove its mention in the Documentation too. Signed-off-by:
Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/r/20230306191712.230658-1-ojeda@kernel.orgSigned-off-by:
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Glenn Washburn authored
The details for struct dentry_operations member d_weak_revalidate is missing a "d_" prefix. Fixes: af96c1e3 ("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.comSigned-off-by:
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Song Shuai authored
This commit 7d207831 ("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:
Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230227105941.2749193-1-suagrfillet@gmail.comSigned-off-by:
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- 05 Mar, 2023 7 commits
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Linus Torvalds authored
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Linus Torvalds authored
Commit aa47a7c2 ("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 6f9c07be ("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>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
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
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
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 -
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
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() -
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
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
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
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
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