1. 04 Sep, 2018 1 commit
  2. 21 Feb, 2018 1 commit
    • Martin Kelly's avatar
      tools: fix cross-compile var clobbering · 7ed1c190
      Martin Kelly authored
      Currently a number of Makefiles break when used with toolchains that
      pass extra flags in CC and other cross-compile related variables (such
      as --sysroot).
      
      Thus we get this error when we use a toolchain that puts --sysroot in
      the CC var:
      
        ~/src/linux/tools$ make iio
        [snip]
        iio_event_monitor.c:18:10: fatal error: unistd.h: No such file or directory
          #include <unistd.h>
                   ^~~~~~~~~~
      
      This occurs because we clobber several env vars related to
      cross-compiling with lines like this:
      
        CC = $(CROSS_COMPILE)gcc
      
      Although this will point to a valid cross-compiler, we lose any extra
      flags that might exist in the CC variable, which can break toolchains
      that rely on them (for example, those that use --sysroot).
      
      This easily shows up using a Yocto SDK:
      
        $ . [snip]/sdk/environment-setup-cortexa8hf-neon-poky-linux-gnueabi
      
        $ echo $CC
        arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard
        -mcpu=cortex-a8
        --sysroot=[snip]/sdk/sysroots/cortexa8hf-neon-poky-linux-gnueabi
      
        $ echo $CROSS_COMPILE
        arm-poky-linux-gnueabi-
      
        $ echo ${CROSS_COMPILE}gcc
        krm-poky-linux-gnueabi-gcc
      
      Although arm-poky-linux-gnueabi-gcc is a cross-compiler, we've lost the
      --sysroot and other flags that enable us to find the right libraries to
      link against, so we can't find unistd.h and other libraries and headers.
      Normally with the --sysroot flag we would find unistd.h in the sdk
      directory in the sysroot:
      
        $ find [snip]/sdk/sysroots -path '*/usr/include/unistd.h'
        [snip]/sdk/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/include/unistd.h
      
      The perf Makefile adds CC = $(CROSS_COMPILE)gcc if and only if CC is not
      already set, and it compiles correctly with the above toolchain.
      
      So, generalize the logic that perf uses in the common Makefile and
      remove the manual CC = $(CROSS_COMPILE)gcc lines from each Makefile.
      
      Note that this patch does not fix cross-compile for all the tools (some
      have other bugs), but it does fix it for all except usb and acpi, which
      still have other unrelated issues.
      
      I tested both with and without the patch on native and cross-build and
      there appear to be no regressions.
      
      Link: http://lkml.kernel.org/r/20180107214028.23771-1-martin@martingkelly.comSigned-off-by: 's avatarMartin Kelly <martin@martingkelly.com>
      Acked-by: 's avatarMark Brown <broonie@kernel.org>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Li Zefan <lizefan@huawei.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Cc: "K. Y. Srinivasan" <kys@microsoft.com>
      Cc: Haiyang Zhang <haiyangz@microsoft.com>
      Cc: Stephen Hemminger <sthemmin@microsoft.com>
      Cc: Jonathan Cameron <jic23@kernel.org>
      Cc: Pali Rohar <pali.rohar@gmail.com>
      Cc: Richard Purdie <rpurdie@rpsys.net>
      Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
      Cc: Pavel Machek <pavel@ucw.cz>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
      Cc: Robert Moore <robert.moore@intel.com>
      Cc: Lv Zheng <lv.zheng@intel.com>
      Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Valentina Manea <valentina.manea.m@gmail.com>
      Cc: Shuah Khan <shuah@kernel.org>
      Cc: Mario Limonciello <mario.limonciello@dell.com>
      Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
      7ed1c190
  3. 02 Nov, 2017 1 commit
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      Many source files in the tree are missing licensing information, which
      makes it harder for compliance tools to determine the correct license.
      
      By default all files without license information are under the default
      license 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 binding
      shorthand, which can be used instead of the full boiler plate text.
      
      This patch is based on work done by Thomas Gleixner and Kate Stewart and
      Philippe Ombredanne.
      
      How this work was done:
      
      Patches were generated and checked against linux-4.14-rc6 for a subset of
      the 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 cases
      where non-standard license headers were used, and references to license
      had to be inferred by heuristics based on keywords.
      
      The analysis to determine which SPDX License Identifier to be applied to
      a file was done in a spreadsheet of side by side results from of the
      output of two independent scanners (ScanCode & Windriver) producing SPDX
      tag:value files created by Philippe Ombredanne.  Philippe prepared the
      base 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 files
      assessed.  Kate Stewart did a file by file comparison of the scanner
      results in the spreadsheet to determine which SPDX license identifier(s)
      to be applied to the file. She confirmed any determination that was not
      immediately 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 license
      identifiers 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 the
      spreadsheet to determine the SPDX license identifiers to apply to the
      source files by Kate, Philippe, Thomas and, in some cases, confirmation
      by lawyers working with the Linux Foundation.
      
      Kate also obtained a third independent scan of the 4.13 code base from
      FOSSology, and compared selected files where the other two scanners
      disagreed against that SPDX file, to see if there was new insights.  The
      Windriver scanner is based on an older version of FOSSology in part, so
      they are related.
      
      Thomas did random spot checks in about 500 files from the spreadsheets
      for the uapi headers and agreed with SPDX license identifier in the
      files he inspected. For the non-uapi files Thomas did random spot checks
      in about 15000 files.
      
      In initial set of patches against 4.14-rc6, 3 files were found to have
      copy/paste license identifier errors, and have been fixed to reflect the
      correct identifier.
      
      Additionally Philippe spent 10 hours this week doing a detailed manual
      inspection and review of the 12,461 patched files from the initial patch
      version 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 correct
      
      This produced a worksheet with 20 files needing minor correction.  This
      worksheet was then exported into 3 different .csv files for the
      different types of files to be modified.
      
      These .csv files were then reviewed by Greg.  Thomas wrote a script to
      parse the csv files and add the proper SPDX tag to the file, in the
      format that the file expected.  This script was further refined by Greg
      based on the output to detect more types of files automatically and to
      distinguish between header and source .c files (which need different
      comment types.)  Finally Greg ran the script using the .csv files to
      generate the patches.
      Reviewed-by: 's avatarKate Stewart <kstewart@linuxfoundation.org>
      Reviewed-by: 's avatarPhilippe Ombredanne <pombredanne@nexb.com>
      Reviewed-by: 's avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b2441318
  4. 26 Jul, 2017 2 commits
  5. 21 Mar, 2017 1 commit
  6. 04 Nov, 2016 1 commit
  7. 14 Sep, 2016 1 commit
    • Geert Uytterhoeven's avatar
      spi: spidev_test: Fix buffer overflow in unescape() · 0278b34b
      Geert Uytterhoeven authored
      Sometimes spidev_test crashes with:
      
          *** Error in `spidev_test': munmap_chunk(): invalid pointer: 0x00022020 ***
          Aborted
      
      or just
      
          Segmentation fault
      
      This is due to transfer_escaped_string() miscalculating the required
      size of the buffer by one byte, causing a buffer overflow in unescape().
      
      Drop the bogus "+ 1" in the strlen() parameter to fix this.
      
      Note that unescape() never copies the zero-terminator of the source
      string, so it writes at most as many bytes as the length of the source
      string.
      
      Fixes: 30061915 (spi: spidev_test: Added input buffer from the terminal)
      Signed-off-by: 's avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Signed-off-by: 's avatarMark Brown <broonie@kernel.org>
      Cc: <stable@vger.kernel.org> # v4.5+
      0278b34b
  8. 12 Sep, 2016 1 commit
  9. 15 Aug, 2016 1 commit
    • Baruch Siach's avatar
      spi: spidev_test: fix build with musl libc · 8736f802
      Baruch Siach authored
      spidev.h uses _IOC_SIZEBITS directly. musl libc does not provide this macro
      unless linux/ioctl.h is included explicitly. Fixes build failures like:
      
      In file included from .../host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/sys/ioctl.h:7:0,
                       from .../build/spidev_test-v3.15/spidev_test.c:20:
      .../build/spidev_test-v3.15/spidev_test.c: In function ‘transfer’:
      .../build/spidev_test-v3.15/spidev_test.c:75:18: error: ‘_IOC_SIZEBITS’ undeclared (first use in this function)
        ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
                        ^
      Signed-off-by: 's avatarBaruch Siach <baruch@tkos.co.il>
      Signed-off-by: 's avatarMark Brown <broonie@kernel.org>
      8736f802
  10. 08 Dec, 2015 1 commit
  11. 30 Nov, 2015 1 commit
  12. 23 Nov, 2015 6 commits