Changes in Kbuild

46bcce50 - arch, mm: move definition of node_data to generic code

Wed, 07 Aug 2024 06:40:51 +0000

arch, mm: move definition of node_data to generic codeEvery architecture that supports NUMA defines node_data in the same way: struct pglist_data *node_data[MAX_NUMNODES];No reason to keep multiple copies of this definition and its forwarddeclarations, especially when such forward declaration is the only thingin include/asm/mmzone.h for many architectures.Add definition and declaration of node_data to generic code and droparchitecture-specific versions.Link: https://lkml.kernel.org/r/20240807064110.1003856-8-rppt@kernel.orgSigned-off-by: Mike Rapoport (Microsoft) Acked-by: David Hildenbrand Reviewed-by: Jonathan Cameron Acked-by: Davidlohr Bueso Tested-by: Zi Yan # for x86_64 and arm64Tested-by: Jonathan Cameron [arm64 + CXL via QEMU]Acked-by: Dan Williams Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: David S. Miller Cc: Greg Kroah-Hartman Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiaxun Yang Cc: John Paul Adrian Glaubitz Cc: Jonathan Corbet Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Rafael J. Wysocki Cc: Rob Herring (Arm) Cc: Samuel Holland Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/s390/include/asm/Kbuild

ee4ac527 - s390: remove

Sun, 06 Aug 2023 15:16:40 +0000

s390: remove All *.S files under arch/s390/ have been converted to include instead of .Remove .Signed-off-by: Masahiro Yamada Link: https://lore.kernel.org/r/20230806151641.394720-3-masahiroy@kernel.orgSigned-off-by: Heiko Carstens List of files: /linux-6.15/arch/s390/include/asm/Kbuild

87dbc209 - local64.h: make mandatory

Tue, 29 Dec 2020 23:14:49 +0000

local64.h: make mandatoryMake mandatory in include/asm-generic/Kbuild andremove all arch/*/include/asm/local64.h arch-specific files since theyonly #include .This fixes build errors on arch/c6x/ and arch/nios2/ forblock/blk-iocost.c.Build-tested on 21 of 25 arch-es. (tools problems on the others)Yes, we could even rename to and change all #includes to use instead.Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.orgSigned-off-by: Randy Dunlap Suggested-by: Christoph Hellwig Reviewed-by: Masahiro Yamada Cc: Jens Axboe Cc: Ley Foon Tan Cc: Mark Salter Cc: Aurelien Jacquiot Cc: Peter Zijlstra Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/s390/include/asm/Kbuild

2aa9c199 - KVM: Move x86's version of struct kvm_mmu_memory_cache to common code

Fri, 03 Jul 2020 02:35:38 +0000

KVM: Move x86's version of struct kvm_mmu_memory_cache to common codeMove x86's 'struct kvm_mmu_memory_cache' to common code in anticipationof moving the entire x86 implementation code to common KVM and reusingit for arm64 and MIPS. Add a new architecture specific asm/kvm_types.hto control the existence and parameters of the struct. The new headeris needed to avoid a chicken-and-egg problem with asm/kvm_host.h as allarchitectures define instances of the struct in their vCPU structs.Add an asm-generic version of kvm_types.h to avoid having empty files onPPC and s390 in the long term, and for arm64 and mips in the short term.Suggested-by: Christoffer Dall Reviewed-by: Ben Gardon Signed-off-by: Sean Christopherson Message-Id: <20200703023545.8771-15-sean.j.christopherson@intel.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/s390/include/asm/Kbuild

630f289b - asm-generic: make more kernel-space headers mandatory

Thu, 02 Apr 2020 04:03:12 +0000

asm-generic: make more kernel-space headers mandatoryChange a header to mandatory-y if both of the following are met:[1] At least one architecture (except um) specifies it as generic-y in arch/*/include/asm/Kbuild[2] Every architecture (except um) either has its own implementation (arch/*/include/asm/*.h) or specifies it as generic-y in arch/*/include/asm/KbuildThis commit was generated by the following shell script.----------------------------------->8-----------------------------------arches=$(cd arch; ls -1 | sed -e '/Kconfig/d' -e '/um/d')tmpfile=$(mktemp)grep "^mandatory-y +=" include/asm-generic/Kbuild > $tmpfilefind arch -path 'arch/*/include/asm/Kbuild' | xargs sed -n 's/^generic-y += $.*$/\1/p' | sort -u |while read headerdo mandatory=yes for arch in $arches do if ! grep -q "generic-y += $header" arch/$arch/include/asm/Kbuild && ! [ -f arch/$arch/include/asm/$header ]; then mandatory=no break fi done if [ "$mandatory" = yes ]; then echo "mandatory-y += $header" >> $tmpfile for arch in $arches do sed -i "/generic-y += $header/d" arch/$arch/include/asm/Kbuild done fidonesed -i '/^mandatory-y +=/d' include/asm-generic/KbuildLANG=C sort $tmpfile >> include/asm-generic/Kbuild----------------------------------->8-----------------------------------One obvious benefit is the diff stat: 25 files changed, 52 insertions(+), 557 deletions(-)It is tedious to list generic-y for each arch that needs it.So, mandatory-y works like a fallback default (by just wrappingasm-generic one) when arch does not have a specific headerimplementation.See the following commits:def3f7cefe4e81c296090e1722a76551142c227ca1b39bae16a62ce4aae02d958224f19316d98b24It is tedious to convert headers one by one, so I processed by a shellscript.Signed-off-by: Masahiro Yamada Signed-off-by: Andrew Morton Cc: Michal Simek Cc: Christoph Hellwig Cc: Arnd Bergmann Link: http://lkml.kernel.org/r/20200210175452.5030-1-masahiroy@kernel.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/arch/s390/include/asm/Kbuild

def3f7ce - asm-generic: Make dma-contiguous.h a mandatory include/asm header

Fri, 17 Jan 2020 07:48:17 +0000

asm-generic: Make dma-contiguous.h a mandatory include/asm headerdma-continuguous.h is generic for all architectures except arm32 which hasits own version.Similar change was done for msi.h by commit a1b39bae16a6("asm-generic: Make msi.h a mandatory include/asm header")Suggested-by: Christoph Hellwig Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122eSigned-off-by: Michal Simek Reviewed-by: Christoph Hellwig Acked-by: Thomas Gleixner Acked-by: Arnd Bergmann Acked-by: Paul Walmsley # for arch/riscv List of files: /linux-6.15/arch/s390/include/asm/Kbuild

fdcd06a8 - arch: Use asm-generic header for asm/mmiowb.h

Fri, 22 Feb 2019 12:49:41 +0000

arch: Use asm-generic header for asm/mmiowb.hHook up asm-generic/mmiowb.h to Kbuild for all architectures so that wecan subsequently include asm/mmiowb.h from core code.Cc: Masahiro Yamada Cc: Arnd Bergmann Acked-by: Linus Torvalds Signed-off-by: Will Deacon List of files: /linux-6.15/arch/s390/include/asm/Kbuild

46ad0840 - locking/rwsem: Remove arch specific rwsem files

Fri, 22 Mar 2019 14:30:06 +0000

locking/rwsem: Remove arch specific rwsem filesAs the generic rwsem-xadd code is using the appropriate acquire andrelease versions of the atomic operations, the arch specific rwsem.hfiles will not be that much faster than the generic code as long as theatomic functions are properly implemented. So we can remove those archspecific rwsem.h and stop building asm/rwsem.h to reduce maintenanceeffort.Currently, only x86, alpha and ia64 have implemented architecturespecific fast paths. I don't have access to alpha and ia64 systems fortesting, but they are legacy systems that are not likely to be updatedto the latest kernel anyway.By using a rwsem microbenchmark, the total locking rates on a 4-socket56-core 112-thread x86-64 system before and after the patch were asfollows (mixed means equal # of read and write locks): Before Patch After Patch # of Threads wlock rlock mixed wlock rlock mixed ------------ ----- ----- ----- ----- ----- ----- 1 29,201 30,143 29,458 28,615 30,172 29,201 2 6,807 13,299 1,171 7,725 15,025 1,804 4 6,504 12,755 1,520 7,127 14,286 1,345 8 6,762 13,412 764 6,826 13,652 726 16 6,693 15,408 662 6,599 15,938 626 32 6,145 15,286 496 5,549 15,487 511 64 5,812 15,495 60 5,858 15,572 60There were some run-to-run variations for the multi-thread tests. Forx86-64, using the generic C code fast path seems to be a little bitfaster than the assembly version with low lock contention. Looking atthe assembly version of the fast paths, there are assembly to/from Ccode wrappers that save and restore all the callee-clobbered registers(7 registers on x86-64). The assembly generated from the generic Ccode doesn't need to do that. That may explain the slight performancegain here.The generic asm rwsem.h can also be merged into kernel/locking/rwsem.hwith no code change as no other code other than those underkernel/locking needs to access the internal rwsem macros and functions.Signed-off-by: Waiman Long Signed-off-by: Peter Zijlstra (Intel) Acked-by: Linus Torvalds Cc: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Davidlohr Bueso Cc: H. Peter Anvin Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tim Chen Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.orgCc: linux-c6x-dev@linux-c6x.orgCc: linux-m68k@lists.linux-m68k.orgCc: linux-riscv@lists.infradead.orgCc: linux-um@lists.infradead.orgCc: linux-xtensa@linux-xtensa.orgCc: linuxppc-dev@lists.ozlabs.orgCc: nios2-dev@lists.rocketboards.orgCc: openrisc@lists.librecores.orgCc: uclinux-h8-devel@lists.sourceforge.jpLink: https://lkml.kernel.org/r/20190322143008.21313-2-longman@redhat.comSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/s390/include/asm/Kbuild

7cbbbb8b - kbuild: warn redundant generic-y

Sun, 17 Mar 2019 02:01:08 +0000

kbuild: warn redundant generic-yThe generic-y is redundant under the following condition: - arch has its own implementation - the same header is added to generated-y - the same header is added to mandatory-yIf a redundant generic-y is found, the warning like follows is displayed: scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.hI fixed up arch Kbuild files found by this.Suggested-by: Sam Ravnborg Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/s390/include/asm/Kbuild

7fbf8315 - s390/tools: generate header files in arch/s390/include/generated/

Thu, 11 Jan 2018 11:13:18 +0000

s390/tools: generate header files in arch/s390/include/generated/Previously, the generated dis.h and facilities.h header files have beenstored in include/generated. Because they are s390 specific, store themin the arch/s390/include/generated/asm/ directory. Also updatereferences to the header files respectively.To prevent name collisions with those header files in asm/ thatinclude the generated ones, rename the generated headers filesand add an -defs suffix. Also update the generators to createthe ifdef guards respectively.Signed-off-by: Hendrik Brueckner Acked-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

4381f9f1 - s390/syscalls: use generated syscall_table.h and unistd.h header files

Mon, 11 Dec 2017 13:47:27 +0000

s390/syscalls: use generated syscall_table.h and unistd.h header filesUpdate the uapi/asm/unistd.h to include the generated compat and64-bit version of the unistd.h and, as well as, the unistd_nr.hheader file. Also remove the arch/s390/kernel/syscalls.S fileand use the generated system call table, syscall_table.h, instead.Signed-off-by: Hendrik Brueckner Acked-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

c5cd037d - dma-mapping: provide a generic asm/dma-mapping.h

Sat, 23 Dec 2017 09:56:51 +0000

dma-mapping: provide a generic asm/dma-mapping.hFor architectures that just use the generic dma_noop_ops we can providea generic version of dma-mapping.h.Signed-off-by: Christoph Hellwig List of files: /linux-6.15/arch/s390/include/asm/Kbuild

e0af0c16 - arch: Remove clkdev.h asm-generic from Kbuild

Tue, 02 Jan 2018 23:50:06 +0000

arch: Remove clkdev.h asm-generic from KbuildNow that every architecture is using the generic clkdev.h fileand we no longer include asm/clkdev.h anywhere in the tree, wecan remove it.Cc: Russell King Acked-by: Arnd Bergmann Cc: Acked-by: Geert Uytterhoeven [m68k]Signed-off-by: Stephen Boyd List of files: /linux-6.15/arch/s390/include/asm/Kbuild

9fa1db4c - s390: add a few more SPDX identifiers

Mon, 04 Dec 2017 09:39:38 +0000

s390: add a few more SPDX identifiersAdd the correct SPDX license to a few more files under arch/s390 anddrivers/s390 which have been missed to far.The SPDX identifier is a legally binding shorthand, which can be usedinstead of the full boiler plate text.Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

91a1fad7 - s390: use generic rwsem implementation

Sat, 30 Sep 2017 08:54:31 +0000

s390: use generic rwsem implementationWe never optimized our rwsem inline assemblies to make use of the newatomic instructions. The generic rwsem implementation implicitly makesuse of the new instructions, since it implements the required rwsemprimitives with atomic operations, which we did optimize.However even when compiling for old architectures the generic variantstill generates better code. So it's time to simply remove our oldcode and switch to the generic implementation.Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

83a88424 - s390: use generic asm/unaligned.h

Wed, 02 Aug 2017 11:21:00 +0000

s390: use generic asm/unaligned.hAnd another header file for which we can use the generic variant,even though it doesn't look obvious at first glance.Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

6c386da7 - s390: use two more generic header files

Fri, 12 May 2017 10:57:40 +0000

s390: use two more generic header filesI missed at least these two header files where we can make use of thegeneric ones. vga.h is another one, however that is already addressedby a patch from Jiri Slaby.Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

e6ccbff0 - treewide: decouple cacheflush.h and set_memory.h

Mon, 08 May 2017 22:58:47 +0000

treewide: decouple cacheflush.h and set_memory.hNow that all call sites, completely decouple cacheflush.h andset_memory.h[sfr@canb.auug.org.au: kprobes/x86: merge fix for set_memory.h decoupling] Link: http://lkml.kernel.org/r/20170418180903.10300fd3@canb.auug.org.auLink: http://lkml.kernel.org/r/1488920133-27229-17-git-send-email-labbott@redhat.comSigned-off-by: Laura Abbott Signed-off-by: Stephen Rothwell Acked-by: Catalin Marinas Acked-by: Mark Rutland Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/s390/include/asm/Kbuild

4d6e51c7 - s390: use generic headers if possible

Wed, 29 Mar 2017 08:30:48 +0000

s390: use generic headers if possibleSigned-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild

6bc32bf0 - s390: use generic asm-offsets.h

Mon, 28 Nov 2016 21:12:18 +0000

s390: use generic asm-offsets.hSigned-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/Kbuild