Changes in Makefile

aef25be3 - hexagon: Disable constant extender optimization for LLVM prior to 19.1.0

Thu, 21 Nov 2024 18:22:18 +0000

hexagon: Disable constant extender optimization for LLVM prior to 19.1.0The Hexagon-specific constant extender optimization in LLVM may crash onLinux kernel code [1], such as fs/bcache/btree_io.c aftercommit 32ed4a620c54 ("bcachefs: Btree path tracepoints") in 6.12: clang: llvm/lib/Target/Hexagon/HexagonConstExtenders.cpp:745: bool (anonymous namespace)::HexagonConstExtenders::ExtRoot::operator<(const HCE::ExtRoot &) const: Assertion `ThisB->getParent() == OtherB->getParent()' failed. Stack dump: 0. Program arguments: clang --target=hexagon-linux-musl ... fs/bcachefs/btree_io.c 1. parser at end of file 2. Code generation 3. Running pass 'Function Pass Manager' on module 'fs/bcachefs/btree_io.c'. 4. Running pass 'Hexagon constant-extender optimization' on function '@__btree_node_lock_nopath'Without assertions enabled, there is just a hang during compilation.This has been resolved in LLVM main (20.0.0) [2] and backported to LLVM19.1.0 but the kernel supports LLVM 13.0.1 and newer, so disable theconstant expander optimization using the '-mllvm' option when using atoolchain that is not fixed.Cc: stable@vger.kernel.orgLink: https://github.com/llvm/llvm-project/issues/99714 [1]Link: https://github.com/llvm/llvm-project/commit/68df06a0b2998765cb0a41353fcf0919bbf57ddb [2]Link: https://github.com/llvm/llvm-project/commit/2ab8d93061581edad3501561722ebd5632d73892 [3]Reviewed-by: Brian Cain Signed-off-by: Nathan Chancellor Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/hexagon/Makefile

ce697cce - kbuild: remove head-y syntax

Sat, 24 Sep 2022 18:19:15 +0000

kbuild: remove head-y syntaxKbuild puts the objects listed in head-y at the head of vmlinux.Conventionally, we do this for head*.S, which contains the kernel entrypoint.A counter approach is to control the section order by the linker script.Actually, the code marked as __HEAD goes into the ".head.text" section,which is placed before the normal ".text" section.I do not know if both of them are needed. From the build systemperspective, head-y is not mandatory. If you can achieve the proper codeplacement by the linker script only, it would be cleaner.I collected the current head-y objects into head-object-list.txt. It isa whitelist. My hope is it will be reduced in the long run.Signed-off-by: Masahiro Yamada Tested-by: Nick Desaulniers Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/hexagon/Makefile

3681c854 - hexagon: move core-y in arch/hexagon/Makefile to arch/hexagon/Kbuild

Wed, 12 May 2021 07:57:28 +0000

hexagon: move core-y in arch/hexagon/Makefile to arch/hexagon/KbuildUse obj-y to clean up Makefile.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/hexagon/Makefile

f1f99adf - Hexagon: add target builtins to kernel

Tue, 13 Oct 2020 21:17:50 +0000

Hexagon: add target builtins to kernelAdd the compiler-rt builtins like memcpy to the hexagon kernel.Signed-off-by: Sid Manning Add SYM_FUNC_START/END, ksyms exportsSigned-off-by: Brian Cain Tested-by: Nick Desaulniers List of files: /linux-6.15/arch/hexagon/Makefile

788dcee0 - Hexagon: fix build errors

Fri, 23 Apr 2021 20:06:58 +0000

Hexagon: fix build errorsFix type-o in ptrace.c.Add missing include: asm/hexagon_vm.hRemove superfluous cast.Replace 'p3_0' with 'preds'.Signed-off-by: Sid Manning Add -mlong-calls to build flags.Signed-off-by: Brian Cain Tested-by: Nick Desaulniers Reviewed-by: Nick Desaulniers List of files: /linux-6.15/arch/hexagon/Makefile

6632fa8f - hexagon: suppress error message for 'make clean'

Fri, 24 Apr 2020 16:15:02 +0000

hexagon: suppress error message for 'make clean''make ARCH=hexagon clean' emits an error message as follows: $ make ARCH=hexagon clean gcc: error: unrecognized command line option '-G0'You can suppress it by setting the correct CROSS_COMPILE=,but we should not require any compiler for cleaning.Signed-off-by: Masahiro Yamada Acked-by: Brian Cain List of files: /linux-6.15/arch/hexagon/Makefile

d503ac53 - kbuild: rename LDFLAGS to KBUILD_LDFLAGS

Thu, 23 Aug 2018 23:20:39 +0000

kbuild: rename LDFLAGS to KBUILD_LDFLAGSCommit a0f97e06a43c ("kbuild: enable 'make CFLAGS=...' to addadditional options to CC") renamed CFLAGS to KBUILD_CFLAGS.Commit 222d394d30e7 ("kbuild: enable 'make AFLAGS=...' to addadditional options to AS") renamed AFLAGS to KBUILD_AFLAGS.Commit 06c5040cdb13 ("kbuild: enable 'make CPPFLAGS=...' to addadditional options to CPP") renamed CPPFLAGS to KBUILD_CPPFLAGS.For some reason, LDFLAGS was not renamed.Using a well-known variable like LDFLAGS may result in accidentaloverride of the variable.Kbuild generally uses KBUILD_ prefixed variables for the internallyappended options, so here is one more conversion to sanitize thenaming convention.I did not touch Makefiles under tools/ since the tools build systemis a different world.Signed-off-by: Masahiro Yamada Acked-by: Kirill A. Shutemov Reviewed-by: Palmer Dabbelt List of files: /linux-6.15/arch/hexagon/Makefile

b2441318 - License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Wed, 01 Nov 2017 14:07:57 +0000

License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseMany source files in the tree are missing licensing information, whichmakes it harder for compliance tools to determine the correct license.By default all files without license information are under the defaultlicense of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'SPDX license identifier. The SPDX identifier is a legally bindingshorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart andPhilippe Ombredanne.How this work was done:Patches were generated and checked against linux-4.14-rc6 for a subset ofthe use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up caseswhere non-standard license headers were used, and references to licensehad to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied toa file was done in a spreadsheet of side by side results from of theoutput of two independent scanners (ScanCode & Windriver) producing SPDXtag:value files created by Philippe Ombredanne. Philippe prepared thebase worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 filesassessed. Kate Stewart did a file by file comparison of the scannerresults in the spreadsheet to determine which SPDX license identifier(s)to be applied to the file. She confirmed any determination that was notimmediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines).All documentation files were explicitly excluded.The following heuristics were used to determine which SPDX licenseidentifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time.In total, over 70 hours of logged manual review was done on thespreadsheet to determine the SPDX license identifiers to apply to thesource files by Kate, Philippe, Thomas and, in some cases, confirmationby lawyers working with the Linux Foundation.Kate also obtained a third independent scan of the 4.13 code base fromFOSSology, and compared selected files where the other two scannersdisagreed against that SPDX file, to see if there was new insights. TheWindriver scanner is based on an older version of FOSSology in part, sothey are related.Thomas did random spot checks in about 500 files from the spreadsheetsfor the uapi headers and agreed with SPDX license identifier in thefiles he inspected. For the non-uapi files Thomas did random spot checksin about 15000 files.In initial set of patches against 4.14-rc6, 3 files were found to havecopy/paste license identifier errors, and have been fixed to reflect thecorrect identifier.Additionally Philippe spent 10 hours this week doing a detailed manualinspection and review of the 12,461 patched files from the initial patchversion early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correctThis produced a worksheet with 20 files needing minor correction. Thisworksheet was then exported into 3 different .csv files for thedifferent types of files to be modified.These .csv files were then reviewed by Greg. Thomas wrote a script toparse the csv files and add the proper SPDX tag to the file, in theformat that the file expected. This script was further refined by Gregbased on the output to detect more types of files automatically and todistinguish between header and source .c files (which need differentcomment types.) Finally Greg ran the script using the .csv files togenerate the patches.Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/hexagon/Makefile

3a5befc1 - hexagon/kbuild: replace CFLAGS_MODULE with KBUILD_CFLAGS_MODULE

Mon, 09 Oct 2017 07:11:47 +0000

hexagon/kbuild: replace CFLAGS_MODULE with KBUILD_CFLAGS_MODULEAs kbuild document & commit 6588169d51 says: KBUILD_CFLAGS_MODULE isused to add arch-specific options for $(CC). From commandline,CFLAGS_MODULE shall be used.Doesn't have any functional change, but just follow kbuild rules.Signed-off-by: Cao jin CC: linux-hexagon@vger.kernel.orgAcked-by: Richard Kuo Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/hexagon/Makefile

66b03dbf - Hexagon: change arch version config to allow comparisons

Tue, 27 Mar 2012 22:37:33 +0000

Hexagon: change arch version config to allow comparisonsSigned-off-by: Richard Kuo List of files: /linux-6.15/arch/hexagon/Makefile

5042ab91 - various Kconfig cleanup and old platform build code removal

Tue, 15 Nov 2011 22:31:48 +0000

various Kconfig cleanup and old platform build code removalSigned-off-by: Richard Kuo List of files: /linux-6.15/arch/hexagon/Makefile

e336e05b - hexagon: Use generic idle_task

Thu, 03 May 2012 09:02:54 +0000

hexagon: Use generic idle_taskSame code. Use the generic version. The special Makefile treatment ispointless anyway as init_task.o contains only data which is handled bythe linker script. So no point on being treated like head text.Signed-off-by: Thomas Gleixner Link: http://lkml.kernel.org/r/20120503085034.692078846@linutronix.deAcked-and-tested-by: Richard Kuo List of files: /linux-6.15/arch/hexagon/Makefile

e95bf452 - Hexagon: Add configuration and makefiles for the Hexagon architecture.

Mon, 31 Oct 2011 23:55:58 +0000

Hexagon: Add configuration and makefiles for the Hexagon architecture.Signed-off-by: Linas Vepstas Signed-off-by: Richard Kuo Acked-by: Arnd Bergmann Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/hexagon/Makefile