Changes in Makefile

29665c1e - gcov: shut up missing prototype warnings for internal stubs

Tue, 25 Jul 2023 12:23:38 +0000

gcov: shut up missing prototype warnings for internal stubsgcov uses global functions that are called from generated code, but thesehave no prototype in a header, which causes a W=1 build warning:kernel/gcov/gcc_base.c:12:6: error: no previous prototype for '__gcov_init' [-Werror=missing-prototypes]kernel/gcov/gcc_base.c:40:6: error: no previous prototype for '__gcov_flush' [-Werror=missing-prototypes]kernel/gcov/gcc_base.c:46:6: error: no previous prototype for '__gcov_merge_add' [-Werror=missing-prototypes]kernel/gcov/gcc_base.c:52:6: error: no previous prototype for '__gcov_merge_single' [-Werror=missing-prototypes]Just turn off these warnings unconditionally for the two files thatcontain them.Link: https://lore.kernel.org/all/0820010f-e9dc-779d-7924-49c7df446bce@linux.ibm.com/Link: https://lkml.kernel.org/r/20230725123042.2269077-1-arnd@kernel.orgSigned-off-by: Arnd Bergmann Tested-by: Peter Oberparleiter Acked-by: Peter Oberparleiter Signed-off-by: Andrew Morton List of files: /linux-6.15/kernel/gcov/Makefile

10415533 - gcov: Remove old GCC 3.4 support

Wed, 22 Jan 2020 19:36:29 +0000

gcov: Remove old GCC 3.4 supportThe kernel requires at least GCC 4.8 in order to build, and so there isno need to cater for the pre-4.7 gcov format.Remove the obsolete code.Acked-by: Peter Oberparleiter Reviewed-by: Nick Desaulniers Signed-off-by: Will Deacon List of files: /linux-6.15/kernel/gcov/Makefile

e178a5be - gcov: clang support

Tue, 14 May 2019 22:45:31 +0000

gcov: clang supportLLVM uses profiling data that's deliberately similar to GCC, but has avery different way of exporting that data. LLVM calls llvm_gcov_init()once per module, and provides a couple of callbacks that we can use toask for more data.We care about the "writeout" callback, which in turn calls back intocompiler-rt/this module to dump all the gathered coverage data to disk: llvm_gcda_start_file() llvm_gcda_emit_function() llvm_gcda_emit_arcs() llvm_gcda_emit_function() llvm_gcda_emit_arcs() [... repeats for each function ...] llvm_gcda_summary_info() llvm_gcda_end_file()This design is much more stateless and unstructured than gcc's, and isintended to run at process exit. This forces us to keep some localstate about which module we're dealing with at the moment. On the otherhand, it also means we don't depend as much on how LLVM representsprofiling data internally.See LLVM's lib/Transforms/Instrumentation/GCOVProfiling.cpp for moredetails on how this works, particularly GCOVProfiler::emitProfileArcs(),GCOVProfiler::insertCounterWriteout(), and GCOVProfiler::insertFlush().[akpm@linux-foundation.org: coding-style fixes]Link: http://lkml.kernel.org/r/20190417225328.208129-1-trong@android.comSigned-off-by: Greg Hackmann Signed-off-by: Nick Desaulniers Signed-off-by: Tri Vo Co-developed-by: Nick Desaulniers Co-developed-by: Tri Vo Tested-by: Trilok Soni Tested-by: Prasad Sodagudi Tested-by: Tri Vo Tested-by: Daniel Mentz Tested-by: Petri Gynther Reviewed-by: Peter Oberparleiter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/kernel/gcov/Makefile

826eba0d - gcov: clang: move common GCC code into gcc_base.c

Tue, 14 May 2019 22:45:25 +0000

gcov: clang: move common GCC code into gcc_base.cPatch series "gcov: add Clang support", v4.This patch (of 3):base.c contains a few callbacks specific to GCC's gcov implementation.Move these into their own module in preparation for Clang support.Link: http://lkml.kernel.org/r/20190318025411.98014-2-trong@android.comSigned-off-by: Greg Hackmann Signed-off-by: Nick Desaulniers Signed-off-by: Tri Vo Tested-by: Trilok Soni Tested-by: Prasad Sodagudi Tested-by: Tri Vo Reviewed-by: Peter Oberparleiter Cc: Daniel Mentz Cc: Petri Gynther Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/kernel/gcov/Makefile

6a61b70b - gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT

Mon, 28 May 2018 09:22:03 +0000

gcov: remove CONFIG_GCOV_FORMAT_AUTODETECTCONFIG_GCOV_FORMAT_AUTODETECT compiles either gcc_3_4.c or gcc_4_7.caccording to your GCC version.We can achieve the equivalent behavior by setting reasonable dependencywith the knowledge of the compiler version.If GCC older than 4.7 is used, GCOV_FORMAT_3_4 is the default, but usersare still allowed to select GCOV_FORMAT_4_7 in case the newer format isback-ported.On the other hand, If GCC 4.7 or newer is used, there is no reason touse GCOV_FORMAT_3_4, so it should be hidden.If you downgrade the compiler to GCC 4.7 or older, oldconfig/syncconfigwill display a prompt for the choice because GCOV_FORMAT_3_4 becomesvisible as a new symbol.Signed-off-by: Masahiro Yamada Acked-by: Peter Oberparleiter Reviewed-by: Kees Cook List of files: /linux-6.15/kernel/gcov/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/kernel/gcov/Makefile

a75f8b8d - kbuild,gcov: simplify kernel/gcov/Makefile more

Thu, 25 Dec 2014 05:31:28 +0000

kbuild,gcov: simplify kernel/gcov/Makefile moreCONFIG_GCOV_FORMAT_3_4 / _4_7 / _AUTODETECT are exclusive.Compare the CC version only when _AUTODETECT is enabled.This change should have no impact.Signed-off-by: Masahiro Yamada Cc: Peter Oberparleiter Signed-off-by: Michal Marek List of files: /linux-6.15/kernel/gcov/Makefile

3df80947 - kbuild,gcov: simplify kernel/gcov/Makefile

Thu, 25 Dec 2014 05:31:26 +0000

kbuild,gcov: simplify kernel/gcov/MakefileKbuild descends into kernel/gcov/ directory only whenCONFIG_GCOV_KERNEL is enabled. (See kernel/Makefile)CONFIG_GCOV_KERNEL check can be omitted in kernel/gcov/Makefile.Signed-off-by: Masahiro Yamada Cc: Peter Oberparleiter Signed-off-by: Michal Marek List of files: /linux-6.15/kernel/gcov/Makefile

842857de - kbuild,gcov: remove unnecessary workaround

Thu, 25 Dec 2014 05:31:25 +0000

kbuild,gcov: remove unnecessary workaroundSince commit 371fdc77af44 (kbuild: collect shorthands intoscripts/Kbuild.include), scripts/Makefile.clean includesscripts/Kbuild.include.The workaround and the comment block in kernel/gcov/Makefileare no longer necessary.Signed-off-by: Masahiro Yamada Cc: Peter Oberparleiter Signed-off-by: Michal Marek List of files: /linux-6.15/kernel/gcov/Makefile

665d92e3 - kbuild: do not add $(call ...) to invoke cc-version or cc-fullversion

Thu, 25 Dec 2014 05:31:24 +0000

kbuild: do not add $(call ...) to invoke cc-version or cc-fullversionThe macros cc-version, cc-fullversion and ld-version take no argument.It is not necessary to add $(call ...) to invoke them.Signed-off-by: Masahiro Yamada Acked-by: Helge Deller [parisc]Signed-off-by: Michal Marek List of files: /linux-6.15/kernel/gcov/Makefile

17c568d6 - gcov: compile specific gcov implementation based on gcc version

Tue, 12 Nov 2013 23:11:27 +0000

gcov: compile specific gcov implementation based on gcc versionCompile the correct gcov implementation file for the specific gcc version.Signed-off-by: Frantisek Hrbata Cc: Jan Stancek Cc: Kees Cook Acked-by: Peter Oberparleiter Cc: Rusty Russell Cc: Arnd Bergmann Cc: Andy Gospodarek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/kernel/gcov/Makefile

ed3cd4a8 - kernel: change to new flag variable

Fri, 14 Jan 2011 14:12:24 +0000

kernel: change to new flag variableReplace EXTRA_CFLAGS with ccflags-y.Signed-off-by: matt mooney Acked-by: WANG Cong Signed-off-by: Michal Marek List of files: /linux-6.15/kernel/gcov/Makefile

2521f2c2 - gcov: add gcov profiling infrastructure

Wed, 17 Jun 2009 23:28:08 +0000

gcov: add gcov profiling infrastructureEnable the use of GCC's coverage testing tool gcov [1] with the Linuxkernel. gcov may be useful for: * debugging (has this code been reached at all?) * test improvement (how do I change my test to cover these lines?) * minimizing kernel configurations (do I need this option if the associated code is never run?)The profiling patch incorporates the following changes: * change kbuild to include profiling flags * provide functions needed by profiling code * present profiling data as files in debugfsNote that on some architectures, enabling gcc's profiling option"-fprofile-arcs" for the entire kernel may trigger compile/link/run-time problems, some of which are caused by toolchain bugs andothers which require adjustment of architecture code.For this reason profiling the entire kernel is initially restrictedto those architectures for which it is known to work without changes.This restriction can be lifted once an architecture has been testedand found compatible with gcc's profiling. Profiling of single filesor directories is still available on all platforms (see config helptext).[1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.htmlSigned-off-by: Peter Oberparleiter Cc: Andi Kleen Cc: Huang Ying Cc: Li Wei Cc: Michael Ellerman Cc: Ingo Molnar Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Rusty Russell Cc: WANG Cong Cc: Sam Ravnborg Cc: Jeff Dike Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/kernel/gcov/Makefile