Changes in cache.h

33def849 - treewide: Convert macro and uses of section(foo) to section("foo")

Thu, 22 Oct 2020 02:36:07 +0000

treewide: Convert macro and uses of __section(foo) to __section("foo")Use a more generic form for __section that requires quotes to avoidcomplications with clang and gcc differences.Remove the quote operator # from compiler_attributes.h __section macro.Convert all unquoted __section(foo) uses to quoted __section("foo").Also convert __attribute__((section("foo"))) uses to __section("foo")even if the __attribute__ has multiple list entry forms.Conversion done using the script at: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.plSigned-off-by: Joe Perches Reviewed-by: Nick Desaulniers Reviewed-by: Miguel Ojeda Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/s390/include/asm/cache.h

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/s390/include/asm/cache.h

72a9b02d - s390: use __section macro everywhere

Tue, 07 Jun 2016 08:23:07 +0000

s390: use __section macro everywhereSmall cleanup patch to use the shorter __section macro everywhere.Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/cache.h

d07a980c - s390: add proper __ro_after_init support

Tue, 07 Jun 2016 08:12:55 +0000

s390: add proper __ro_after_init supportOn s390 __ro_after_init is currently mapped to __read_mostly whichmeans that data marked as __ro_after_init will not be protected.Reason for this is that the common code __ro_after_init implementationis x86 centric: the ro_after_init data section was added to rodata,since x86 enables write protection to kernel text and rodata verylate. On s390 we have write protection for these sections enabled withthe initial page tables. So adding the ro_after_init data section torodata does not work on s390.In order to make __ro_after_init work properly on s390 move thero_after_init data, right behind rodata. Unlike the rodata section itwill be marked read-only later after all init calls happened.This s390 specific implementation adds new __start_ro_after_init and__end_ro_after_init labels. Everything in between will be markedread-only after the init calls happened. In addition to the__ro_after_init data move also the exception table there, since from apractical point of view it fits the __ro_after_init requirements.Signed-off-by: Heiko Carstens Reviewed-by: Kees Cook Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/cache.h

df9ceff9 - s390: disable postinit-readonly for now

Thu, 17 Mar 2016 11:45:33 +0000

s390: disable postinit-readonly for nowThis is a temporary fix to let lkdtm run again on s390, though it'llstill fail the ro_after_init tests. Until rodata and ro_after_initsections can be split on s390, disable special handling of ro_after_init.Signed-off-by: Kees Cook Reported-by: Christian Borntraeger Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/cache.h

a53c8fab - s390/comments: unify copyright messages and remove file names

Fri, 20 Jul 2012 09:15:04 +0000

s390/comments: unify copyright messages and remove file namesRemove the file name from the comment at top of many files. In mostcases the file name was wrong anyway, so it's rather pointless.Also unify the IBM copyright statement. We did have a lot of sightlydifferent statements and wanted to change them one after anotherwhenever a file gets touched. However that never happened. Insteadpeople start to take the old/"wrong" statements to use as a templatefor new files.So unify all of them in one go.Signed-off-by: Heiko Carstens List of files: /linux-6.15/arch/s390/include/asm/cache.h

dd30ac32 - [S390] net: provide architecture specific NET_SKB_PAD

Thu, 17 Feb 2011 12:13:59 +0000

[S390] net: provide architecture specific NET_SKB_PADNET_SKB_PAD has been increased from 32 to 64 and later tomax(32, L1_CACHE_BYTES). This led to a 25% throughput decrease forstreaming workloads accompanied by a 37% CPU cost increase on s390.Define a architecture specific NET_SKB_PAD with the old value of 32.Signed-off-by: Horst Hartmann Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/cache.h

54cb27a7 - Rename .data.read_mostly to .data..read_mostly.

Sat, 20 Feb 2010 00:03:44 +0000

Rename .data.read_mostly to .data..read_mostly.Signed-off-by: Denys Vlasenko Signed-off-by: Michal Marek List of files: /linux-6.15/arch/s390/include/asm/cache.h

c6557e7f - [S390] move include/asm-s390 to arch/s390/include/asm

Fri, 01 Aug 2008 18:42:05 +0000

[S390] move include/asm-s390 to arch/s390/include/asmSigned-off-by: Martin Schwidefsky List of files: /linux-6.15/arch/s390/include/asm/cache.h