Changes in 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/arm/include/asm/Kbuild

424c9102 - arm: Enable seccomp architecture tracking

Tue, 27 Oct 2020 19:26:58 +0000

arm: Enable seccomp architecture trackingTo enable seccomp constant action bitmaps, we need to have a staticmapping to the audit architecture and system call table size. Add thesefor arm.Signed-off-by: Kees Cook List of files: /linux-6.15/arch/arm/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/arm/include/asm/Kbuild

a1b39bae - asm-generic: Make msi.h a mandatory include/asm header

Fri, 25 Oct 2019 06:10:37 +0000

asm-generic: Make msi.h a mandatory include/asm headermsi.h is generic for all architectures except x86, which has its ownversion. Enabling MSI by adding msi.h to every architecture's Kbuild isjust an additional step which doesn't need to be done.Make msi.h mandatory in the asm-generic/Kbuild so we don't have to do itfor each architecture.Suggested-by: Christoph Hellwig Link: https://lore.kernel.org/r/c991669e29a79b1a8e28c3b4b3a125801a693de8.1571983829.git.michal.simek@xilinx.comTested-by: Paul Walmsley # build only, rv32/rv64Signed-off-by: Michal Simek Signed-off-by: Bjorn Helgaas Reviewed-by: Masahiro Yamada Acked-by: Waiman Long Acked-by: Paul Walmsley # arch/riscv List of files: /linux-6.15/arch/arm/include/asm/Kbuild

155e4db3 - asm-generic: Remove redundant arch-specific rules for simd.h

Thu, 01 Aug 2019 02:11:33 +0000

asm-generic: Remove redundant arch-specific rules for simd.hNow that simd.h is in include/asm-generic/Kbuild we don't needthe arch-specific Kbuild rules for them.Reported-by: Stephen Rothwell Fixes: 82cb54856874 ("asm-generic: make simd.h a mandatory...")Signed-off-by: Herbert Xu Acked-by: Ard Biesheuvel Acked-by: Arnd Bergmann List of files: /linux-6.15/arch/arm/include/asm/Kbuild

7a8998c9 - binfmt_flat: provide an asm-generic/flat.h

Thu, 13 Jun 2019 07:08:59 +0000

binfmt_flat: provide an asm-generic/flat.hThis file implements the flat get/put reloc helpers for architecturesthat do not need to overload the relocs by simply using get_user/put_user.Note that many nommu architectures currently use {get,put}_unaligned, whichlooks a little bogus and should probably later be switched over to thisversion as well.Signed-off-by: Christoph Hellwig Reviewed-by: Vladimir Murzin Signed-off-by: Greg Ungerer List of files: /linux-6.15/arch/arm/include/asm/Kbuild

96ac6d43 - treewide: Add SPDX license identifier - Kbuild

Thu, 30 May 2019 12:03:44 +0000

treewide: Add SPDX license identifier - KbuildAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0Reported-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman Reviewed-by: Kate Stewart Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/arm/include/asm/Kbuild

b09e8936 - arch: remove and

Tue, 14 May 2019 22:46:54 +0000

arch: remove and Now that all instances of #include have been replaced with#include , we can remove these.Link: http://lkml.kernel.org/r/1553267665-27228-2-git-send-email-yamada.masahiro@socionext.comSigned-off-by: Masahiro Yamada Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm/include/asm/Kbuild

c67fdc1f - arch: mostly remove

Tue, 23 Apr 2019 16:38:07 +0000

arch: mostly remove A few architectures use internally, but nothing incommon code does. Remove all the empty or almost empty versions of it,including the asm-generic one.Signed-off-by: Christoph Hellwig Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/arm/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/arm/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/arm/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/arm/include/asm/Kbuild

2b5a9a37 - time: Add an asm-generic/compat.h file

Mon, 26 Mar 2018 14:59:15 +0000

time: Add an asm-generic/compat.h fileWe have a couple of files that try to include asm/compat.h onarchitectures where this is available. Those should generally use thehigher-level linux/compat.h file, but that in turn fails to includeasm/compat.h when CONFIG_COMPAT is disabled, unless we can providethat header on all architectures.This adds the asm/compat.h for all remaining architectures tosimplify the dependencies.Architectures that are getting removed in linux-4.17 are not changedhere, to avoid needless conflicts with the removal patches. Thosearchitectures are broken by this patch, but we have already shownthat they have no users.Signed-off-by: Arnd Bergmann List of files: /linux-6.15/arch/arm/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/arm/include/asm/Kbuild

1cce91df - ARM: 8715/1: add a private asm/unaligned.h

Fri, 20 Oct 2017 20:17:05 +0000

ARM: 8715/1: add a private asm/unaligned.hThe asm-generic/unaligned.h header provides two different implementationsfor accessing unaligned variables: the access_ok.h version used whenCONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set pretends that all pointersare in fact aligned, while the le_struct.h version convinces gcc that thealignment of a pointer is '1', to make it issue the correct load/storeinstructions depending on the architecture flags.On ARMv5 and older, we always use the second version, to let the compileruse byte accesses. On ARMv6 and newer, we currently use the access_ok.hversion, so the compiler can use any instruction including stm/ldm andldrd/strd that will cause an alignment trap. This trap can significantlyimpact performance when we have to do a lot of fixups and, worse, hasled to crashes in the LZ4 decompressor code that does not have a traphandler.This adds an ARM specific version of asm/unaligned.h that uses thele_struct.h/be_struct.h implementation unconditionally. This should leadto essentially the same code on ARMv6+ as before, with the exception ofusing regular load/store instructions instead of the trapping instructionsmulti-register variants.The crash in the LZ4 decompressor code was probably introduced by thepatch replacing the LZ4 implementation, commit 4e1a33b105dd ("lib: updateLZ4 compressor module"), so linux-4.11 and higher would be affected most.However, we probably want to have this backported to all older stablekernels as well, to help with the performance issues.There are two follow-ups that I think we should also work on, but notbackport to stable kernels, first to change the asm-generic version ofthe header to remove the ARM special case, and second to review allother uses of CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS to see if theymight be affected by the same problem on ARM.Cc: stable@vger.kernel.orgSigned-off-by: Arnd Bergmann Signed-off-by: Russell King List of files: /linux-6.15/arch/arm/include/asm/Kbuild

ae884913 - ARM: move generic-y of exported headers to uapi/asm/Kbuild

Sun, 09 Jul 2017 18:32:37 +0000

ARM: move generic-y of exported headers to uapi/asm/KbuildSince commit fcc8487d477a ("uapi: export all headers under uapidirectories"), all (and only) headers under uapi directories areexported, but asm-generic wrappers are still exceptions.To complete de-coupling the uapi from kernel headers, move generic-yof exported headers to uapi/asm/Kbuild.With this change, "make headers_install" will just need to parseuapi/asm/Kbuild to build up exported headers.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/arm/include/asm/Kbuild

6bc51cba - signal: Remove non-uapi

Sat, 03 Jun 2017 19:01:02 +0000

signal: Remove non-uapi By moving the kernel side __SI_* defintions right next to the userspaceones we can kill the non-uapi versions of includeinclude/asm-generic/siginfo.h and untangle the unholy mess of includes.[ tglx: Removed uapi/asm/siginfo.h from m32r, microblaze, mn10300 and score ]Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.orgCc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.orgCc: Arnd Bergmann Cc: sparclinux@vger.kernel.orgCc: "David S. Miller" Link: http://lkml.kernel.org/r/20170603190102.28866-6-hch@lst.de List of files: /linux-6.15/arch/arm/include/asm/Kbuild

0f9b38cd - arm: switch to generic extable.h

Sun, 25 Dec 2016 08:33:03 +0000

arm: switch to generic extable.hSigned-off-by: Al Viro List of files: /linux-6.15/arch/arm/include/asm/Kbuild

b672592f - sched/cputime: Remove generic asm headers

Tue, 31 Jan 2017 03:09:51 +0000

sched/cputime: Remove generic asm headerscputime_t is now only used by two architectures: * powerpc (when CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y) * s390And since the core doesn't use it anymore, we don't need any arch supportfrom the others. So we can remove their stub implementations.A final cleanup would be to provide an efficient pure archimplementation of cputime_to_nsec() for s390 and powerpc and finallyremove include/linux/cputime.h .Signed-off-by: Frederic Weisbecker Cc: Benjamin Herrenschmidt Cc: Fenghua Yu Cc: Heiko Carstens Cc: Linus Torvalds Cc: Martin Schwidefsky Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Rik van Riel Cc: Stanislaw Gruszka Cc: Thomas Gleixner Cc: Tony Luck Cc: Wanpeng Li Link: http://lkml.kernel.org/r/1485832191-26889-36-git-send-email-fweisbec@gmail.comSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/arm/include/asm/Kbuild

8478132a - Revert "arm: move exports to definitions"

Wed, 23 Nov 2016 10:00:03 +0000

Revert "arm: move exports to definitions"This reverts commit 4dd1837d7589f468ed109556513f476e7a7f9121.Moving the exports for assembly code into the assembly files breaksKSYM trimming, but also breaks modversions.While fixing the KSYM trimming is trivial, fixing modversions bringsus to a technically worse position that we had prior to the abovechange:- We end up with the prototype definitions divorsed from everything else, which means that adding or removing assembly level ksyms become more fragile: * if adding a new assembly ksyms export, a missed prototype in asm-prototypes.h results in a successful build if no module in the selected configuration makes use of the symbol. * when removing a ksyms export, asm-prototypes.h will get forgotten, with armksyms.c, you'll get a build error if you forget to touch the file.- We end up with the same amount of include files and prototypes, they're just in a header file instead of a .c file with their exports.As for lines of code, we don't get much of a size reduction: (original commit) 47 files changed, 131 insertions(+), 208 deletions(-) (fix for ksyms trimming) 7 files changed, 18 insertions(+), 5 deletions(-) (two fixes for modversions) 1 file changed, 34 insertions(+) 3 files changed, 7 insertions(+), 2 deletions(-)which results in a net total of only 25 lines deleted.As there does not seem to be much benefit from this change of approach,revert the change.Signed-off-by: Russell King List of files: /linux-6.15/arch/arm/include/asm/Kbuild