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2023-03-23Documentation: kernel-parameters: sort all "no..." parametersRandy Dunlap1-128/+128
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-23doc:it_IT: translation alignmentFederico Vaga6-182/+214
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-23Documentation: maintainer-tip: Rectify link to "Describe your changes" ↵Bagas Sanjaya1-2/+2
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 <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs/mm: Physical Memory: add example of interleaving nodesMike Rapoport (IBM)1-0/+19
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 <[email protected]> Signed-off-by: Mike Rapoport (IBM) <[email protected]> Reviewed-by: David Hildenbrand <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14qnx4: credit contributors in CREDITSLukas Bulwahn2-9/+12
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 <[email protected]> Acked-By: Anders Larsen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14qnx6: credit contributor and mark filesystem orphanLukas Bulwahn3-8/+10
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: Add relevant kernel publications to list of booksCarlos Bilbao1-5/+31
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 <[email protected]> Signed-off-by: Kaiwan N Billimoria <[email protected]> Signed-off-by: Carlos Bilbao <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14Documentation: kernel-parameters: sort NFS parametersRandy Dunlap1-37/+37
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 <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: [email protected] Cc: Trond Myklebust <[email protected]> Cc: Anna Schumaker <[email protected]> Cc: Chuck Lever <[email protected]> Cc: Jeff Layton <[email protected]> Cc: [email protected] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: admin: unicode: update information on state of lanana.org documentLukas Bulwahn1-5/+4
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14MAINTAINERS: remove historic section DEVICE NUMBER REGISTRYLukas Bulwahn1-5/+0
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14Documentation/process: Add Linux Kernel Contribution Maturity ModelTheodore Ts'o3-0/+118
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 <[email protected]> Co-developed-by: Kees Cook <[email protected]> Signed-off-by: Kees Cook <[email protected]> Co-developed-by: Dan Williams <[email protected]> Signed-off-by: Dan Williams <[email protected]> Acked-by: Jakub Kicinski <[email protected]> Acked-by: Christian Brauner (Microsoft) <[email protected]> Acked-by: Dave Hansen <[email protected]> Acked-by: Jonathan Corbet <[email protected]> Acked-by: Randy Dunlap <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs/sp_SP: Add translation of process/deprecatedCarlos Bilbao2-0/+382
Translate Documentation/process/deprecated.rst into Spanish. Co-developed-by: Sergio Gonzalez <[email protected]> Signed-off-by: Sergio Gonzalez <[email protected]> Signed-off-by: Carlos Bilbao <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: filesystems: vfs: actualize struct super_operations descriptionAlexander Mikhalitsyn1-15/+59
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 <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: Al Viro <[email protected]> Cc: Christian Brauner <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Alexander Mikhalitsyn <[email protected]> Reviewed-by: Christian Brauner <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: filesystems: vfs: actualize struct file_system_type descriptionAlexander Mikhalitsyn1-4/+27
Added descriptions for: - fscontext API ('init_fs_context' method, 'parameters' field) - 'fs_supers' field Cc: Eric Biggers <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: Al Viro <[email protected]> Cc: Christian Brauner <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Alexander Mikhalitsyn <[email protected]> Reviewed-by: Christian Brauner <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14Documentation: fs/proc: corrections and updateRandy Dunlap1-21/+23
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 <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: [email protected] Cc: [email protected] Reviewed-by: Christian Brauner <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: vfio: fix header pathJiri Pirko1-1/+1
The text points to a different header file, fix by changing the path to "uapi". Signed-off-by: Jiri Pirko <[email protected]> Reviewed-by: Yi Liu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-14docs: process: typo fixXujun Leng1-1/+1
In the second paragraph of section "Respond to review comments", there is a spelling mistake: "aganst" should be "against". Signed-off-by: Xujun Leng <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs/mm: hugetlbfs_reserv: fix a reference to a file that doesn't existMike Rapoport (IBM)2-5/+6
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 <[email protected]> Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/ Fixes: ee86588960e2 ("docs/mm: remove useless markup") Signed-off-by: Mike Rapoport (IBM) <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs/mm: Physical Memory: fix a reference to a file that doesn't existMike Rapoport (IBM)1-1/+1
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 <[email protected]> Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/ Fixes: 353c7dd636ed ("docs/mm: Physical Memory: remove useless markup") Signed-off-by: Mike Rapoport (IBM) <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs: rebasing-and-merging: Drop wrong statement about gitUwe Kleine-König1-5/+1
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 <[email protected]> [jc: rewrote changelog] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs: programming-language: add Rust programming language sectionMiguel Ojeda1-1/+18
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs: programming-language: remove mention of the Intel compilerMiguel Ojeda1-5/+0
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 <[email protected]> Reviewed-by: Vincenzo Palazzo <[email protected]> Reviewed-by: Nick Desaulniers <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07docs: Correct missing "d_" prefix for dentry_operations member d_weak_revalidateGlenn Washburn1-1/+1
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 <[email protected]> Reviewed-by: Matthew Wilcox (Oracle) <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-07sched/doc: supplement CPU capacity with RISC-VSong Shuai2-2/+2
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 <[email protected]> Reviewed-by: Palmer Dabbelt <[email protected]> # English Acked-by: Palmer Dabbelt <[email protected]> Reviewed-by: Alex Shi <[email protected]> Reviewed-by: Conor Dooley <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Corbet <[email protected]>
2023-03-05Linux 6.3-rc1Linus Torvalds1-2/+2
2023-03-05cpumask: re-introduce constant-sized cpumask optimizationsLinus Torvalds4-72/+72
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 <[email protected]>
2023-03-05Merge tag 'v6.3-p2' of ↵Linus Torvalds3-23/+53
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 Torvalds3-15/+51
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 Torvalds7-15/+44
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 Torvalds1-0/+1
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 Torvalds11-11/+48
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 Yamada11-287/+5
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 <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Reviewed-by: Nick Desaulniers <[email protected]> Reviewed-by: Nathan Chancellor <[email protected]> Reviewed-by: Miguel Ojeda <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2023-03-05Adding VFS co-maintainerAl Viro1-0/+1
Acked-by: Christian Brauner <[email protected]> Signed-off-by: Al Viro <[email protected]>
2023-03-04Merge tag 'i2c-for-6.3-rc1-part2' of ↵Linus Torvalds2-15/+7
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
2023-03-04mm: avoid gcc complaint about pointer castingLinus Torvalds1-2/+8
The migration code ends up temporarily stashing information of the wrong type in unused fields of the newly allocated destination folio. That all works fine, but gcc does complain about the pointer type mis-use: mm/migrate.c: In function ‘__migrate_folio_extract’: mm/migrate.c:1050:20: note: randstruct: casting between randomized structure pointer types (ssa): ‘struct anon_vma’ and ‘struct address_space’ 1050 | *anon_vmap = (void *)dst->mapping; | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ and gcc is actually right to complain since it really doesn't understand that this is a very temporary special case where this is ok. This could be fixed in different ways by just obfuscating the assignment sufficiently that gcc doesn't see what is going on, but the truly "proper C" way to do this is by explicitly using a union. Using unions for type conversions like this is normally hugely ugly and syntactically nasty, but this really is one of the few cases where we want to make it clear that we're not doing type conversion, we're really re-using the value bit-for-bit just using another type. IOW, this should not become a common pattern, but in this one case using that odd union is probably the best way to document to the compiler what is conceptually going on here. [ Side note: there are valid cases where we convert pointers to other pointer types, notably the whole "folio vs page" situation, where the types actually have fundamental commonalities. The fact that the gcc note is limited to just randomized structures means that we don't see equivalent warnings for those cases, but it migth also mean that we miss other cases where we do play these kinds of dodgy games, and this kind of explicit conversion might be a good idea. ] I verified that at least for an allmodconfig build on x86-64, this generates the exact same code, apart from line numbers and assembler comment changes. Fixes: 64c8902ed441 ("migrate_pages: split unmap_and_move() to _unmap() and _move()") Cc: Huang, Ying <[email protected]> Cc: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2023-03-04Merge tag 'mm-hotfixes-stable-2023-03-04-13-12' of ↵Linus Torvalds19-82/+147
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "17 hotfixes. Eight are for MM and seven are for other parts of the kernel. Seven are cc:stable and eight address post-6.3 issues or were judged unsuitable for -stable backporting" * tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mailmap: map Dikshita Agarwal's old address to his current one mailmap: map Vikash Garodia's old address to his current one fs/cramfs/inode.c: initialize file_ra_state fs: hfsplus: fix UAF issue in hfsplus_put_super panic: fix the panic_print NMI backtrace setting lib: parser: update documentation for match_NUMBER functions kasan, x86: don't rename memintrinsics in uninstrumented files kasan: test: fix test for new meminstrinsic instrumentation kasan: treat meminstrinsic as builtins in uninstrumented files kasan: emit different calls for instrumentable memintrinsics ocfs2: fix non-auto defrag path not working issue ocfs2: fix defrag path triggering jbd2 ASSERT mailmap: map Georgi Djakov's old Linaro address to his current one mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON lib/zlib: DFLTCC deflate does not write all available bits for Z_NO_FLUSH mm/damon/paddr: fix missing folio_put() mm/mremap: fix dup_anon_vma() in vma_merge() case 4
2023-03-04Merge tag 'powerpc-6.3-2' of ↵Linus Torvalds3-8/+2
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Drop orphaned VAS MAINTAINERS entry - Fix build errors with clang and KCSAN - Avoid build errors seen with LD_DEAD_CODE_DATA_ELIMINATION together with recordmcount Thanks to Nathan Chancellor. * tag 'powerpc-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Avoid dead code/data elimination when using recordmcount powerpc/vmlinux.lds: Add .text.asan/tsan sections powerpc: Drop orphaned VAS MAINTAINERS entry
2023-03-04Merge tag 'sound-fix-6.3-rc1' of ↵Linus Torvalds23-152/+263
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A collection of various small fixes that have been gathered since the last PR. The majority of changes are for ASoC, and there is a small change in ASoC PCM core, but the rest are all for driver- specific fixes / quirks / updates" * tag 'sound-fix-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (32 commits) ALSA: ice1712: Delete unreachable code in aureon_add_controls() ALSA: ice1712: Do not left ice->gpio_mutex locked in aureon_add_controls() ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC ALSA: hda/realtek: Improve support for Dell Precision 3260 ASoC: mediatek: mt8195: add missing initialization ASoC: mediatek: mt8188: add missing initialization ASoC: amd: yc: Add DMI entries to support HP OMEN 16-n0xxx (8A43) ASoC: zl38060 add gpiolib dependency ASoC: sam9g20ek: Disable capture unless building with microphone input ASoC: mt8192: Fix range for sidetone positive gain ASoC: mt8192: Report an error if when an invalid sidetone gain is written ASoC: mt8192: Fix event generation for controls ASoC: mt8192: Remove spammy log messages ASoC: mchp-pdmc: fix poc noise at capture startup ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding ASoC: soc-pcm: add option to start DMA after DAI ASoC: mt8183: Fix event generation for I2S DAI operations ASoC: mt8183: Remove spammy logging from I2S DAI driver ASoC: mt6358: Remove undefined HPx Mux enumeration values ASoC: mt6358: Validate Wake on Voice 2 writes ...
2023-03-03Merge tag 'for-v6.3-part2' of ↵Linus Torvalds3-7/+8
git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull more power supply updates from Sebastian Reichel: - Fix DT binding for Richtek RT9467 - Fix a NULL pointer check in the power-supply core - Document meaning of absent "present" property * tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: dt-bindings: power: supply: Revise Richtek RT9467 compatible name ABI: testing: sysfs-class-power: Document absence of "present" property power: supply: fix null pointer check order in __power_supply_register
2023-03-03Merge tag '6.3-rc-smb3-client-fixes-part2' of ↵Linus Torvalds10-157/+190
git://git.samba.org/sfrench/cifs-2.6 Pull more cifs updates from Steve French: - xfstest generic/208 fix (memory leak) - minor netfs fix (to address smatch warning) - a DFS fix for stable - a reconnect race fix - two multichannel fixes - RDMA (smbdirect) fix - two additional writeback fixes from David * tag '6.3-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: cifs: Fix memory leak in direct I/O cifs: prevent data race in cifs_reconnect_tcon() cifs: improve checking of DFS links over STATUS_OBJECT_NAME_INVALID iov: Fix netfs_extract_user_to_sg() cifs: Fix cifs_write_back_from_locked_folio() cifs: reuse cifs_match_ipaddr for comparison of dstaddr too cifs: match even the scope id for ipv6 addresses cifs: Fix an uninitialised variable cifs: Add some missing xas_retry() calls
2023-03-03umh: simplify the capability pointer logicLinus Torvalds1-13/+5
The usermodehelper code uses two fake pointers for the two capability cases: CAP_BSET for reading and writing 'usermodehelper_bset', and CAP_PI to read and write 'usermodehelper_inheritable'. This seems to be a completely unnecessary indirection, since we could instead just use the pointers themselves, and never have to do any "if this then that" kind of logic. So just get rid of the fake pointer values, and use the real pointer values instead. Reviewed-by: Luis Chamberlain <[email protected]> Cc: Eric Biederman <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Kees Cook <[email protected]> Cc: Iurii Zaikin <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2023-03-03Merge tag 'cocci-for-6.3' of ↵Linus Torvalds2-6/+6
git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux Pull coccinelle updates from Julia Lawall: "Changes in make coccicheck and improve a semantic patch This makes a couple of changes in make coccicheck related to shell commands. It also updates the api/atomic_as_refcounter semantic patch to include WARNING in the output message, as done in other cases" * tag 'cocci-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux: scripts: coccicheck: Use /usr/bin/env scripts: coccicheck: Avoid warning about spurious escape coccinelle: api/atomic_as_refcounter: include message type in output
2023-03-03Merge tag 'rust-fixes-6.3-rc1' of https://github.com/Rust-for-Linux/linuxLinus Torvalds1-0/+1
Pull Rust fix from Miguel Ojeda: "A single build error fix: there was a change during the merge window to a C header parsed by the Rust bindings generator, introducing a type that it does not handle well. The fix tells the generator to treat the type as opaque (for now)" * tag 'rust-fixes-6.3-rc1' of https://github.com/Rust-for-Linux/linux: rust: bindgen: Add `alt_instr` as opaque type
2023-03-03Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds36-252/+291
Pull more SCSI updates from James Bottomley: "Updates that missed the first pull, mostly because of needing more soak time. Driver updates (zfcp, ufs, mpi3mr, plus two ipr bug fixes), an enclosure services (ses) update (mostly bug fixes) and other minor bug fixes and changes" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (32 commits) scsi: zfcp: Trace when request remove fails after qdio send fails scsi: zfcp: Change the type of all fsf request id fields and variables to u64 scsi: zfcp: Make the type for accessing request hashtable buckets size_t scsi: ufs: core: Simplify ufshcd_execute_start_stop() scsi: ufs: core: Rely on the block layer for setting RQF_PM scsi: core: Extend struct scsi_exec_args scsi: lpfc: Fix double word in comments scsi: core: Remove the /proc/scsi/${proc_name} directory earlier scsi: core: Fix a source code comment scsi: cxgbi: Remove unneeded version.h include scsi: qedi: Remove unneeded version.h include scsi: mpi3mr: Remove unneeded version.h include scsi: mpi3mr: Fix missing mrioc->evtack_cmds initialization scsi: mpi3mr: Use number of bits to manage bitmap sizes scsi: mpi3mr: Remove unnecessary memcpy() to alltgt_info->dmi scsi: mpi3mr: Fix issues in mpi3mr_get_all_tgt_info() scsi: mpi3mr: Fix an issue found by KASAN scsi: mpi3mr: Replace 1-element array with flex-array scsi: ipr: Work around fortify-string warning scsi: ipr: Make ipr_probe_ioa_part2() return void ...
2023-03-03i2c: gxp: fix an error code in probeDan Carpenter1-1/+1
This is passing IS_ERR() instead of PTR_ERR() so instead of an error code it prints and returns the number 1. Fixes: 4a55ed6f89f5 ("i2c: Add GXP SoC I2C Controller") Signed-off-by: Dan Carpenter <[email protected]> Reviewed-by: Nick Hawkins <[email protected]> Signed-off-by: Wolfram Sang <[email protected]>
2023-03-03i2c: gxp: return proper error on address NACKWolfram Sang1-2/+4
According to Documentation/i2c/fault-codes.rst, NACK after sending an address should be -ENXIO. Signed-off-by: Wolfram Sang <[email protected]>
2023-03-03i2c: gxp: remove "empty" switch statementWolfram Sang1-12/+1
There used to be error messages which had to go. Now, it only consists of 'break's, so it can go. Signed-off-by: Wolfram Sang <[email protected]>
2023-03-03i2c: Disable I2C_APPLE when I2C_PASEMI is a builtinBenjamin Gray1-0/+1
The ppc64le_allmodconfig sets I2C_PASEMI=y and leaves COMPILE_TEST to default to y and I2C_APPLE to default to m, running into a known incompatible configuration that breaks the build [1]. Specifically, a common dependency (i2c-pasemi-core.o in this case) cannot be used by both builtin and module consumers. Disable I2C_APPLE when I2C_PASEMI is a builtin to prevent this. [1]: https://lore.kernel.org/all/[email protected] Suggested-by: Arnd Bergmann <[email protected]> Signed-off-by: Benjamin Gray <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Acked-by: Sven Peter <[email protected]> Signed-off-by: Wolfram Sang <[email protected]>
2023-03-03Merge tag 'thermal-6.3-rc1-2' of ↵Linus Torvalds2-11/+4
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more thermal control updates from Rafael Wysocki: "These fix two issues in the Intel thermal control drivers. Specifics: - Fix an error pointer dereference in the quark_dts Intel thermal driver (Dan Carpenter) - Fix the intel_bxt_pmic_thermal driver Kconfig entry to select REGMAP which is not user-visible instead of depending on it (Randy Dunlap)" * tag 'thermal-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: thermal: intel: BXT_PMIC: select REGMAP instead of depending on it thermal: intel: quark_dts: fix error pointer dereference
2023-03-03Merge tag 'acpi-6.3-rc1-2' of ↵Linus Torvalds3-48/+20
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI updates from Rafael Wysocki: "These update ACPI quirks for some x86 platforms and add an IRQ override quirk for one more system. Specifics: - Add an ACPI IRQ override quirk for Asus Expertbook B2402FBA (Vojtech Hejsek) - Drop a suspend-to-idle quirk for HP Elitebook G9 that is not needed any more after a firmware update (Mario Limonciello) - Add all Cezanne systems to the list for forcing StorageD3Enable, because they all need the same quirk (Mario Limonciello)" * tag 'acpi-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: x86: utils: Add Cezanne to the list for forcing StorageD3Enable ACPI: x86: Drop quirk for HP Elitebook ACPI: resource: Skip IRQ override on Asus Expertbook B2402FBA