10 Aug, 2020

1 commit

• e0fe0bbe5   kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled ... Browse Code »

  Currently, the top Makefile includes all of scripts/Makefile.
  even if the associated CONFIG option is disabled.

  Do not include unneeded Makefiles in order to slightly optimize the
  parse stage.

  Include $(include-y), and ignore $(include-).

  Signed-off-by: Masahiro Yamada

  Masahiro Yamada

  2020-08-10 00:32:59 +0800  

21 May, 2019

1 commit

• ec8f24b7f   treewide: Add SPDX license identifier - Makefile/Kconfig ... Browse Code »

  Add SPDX license identifiers to all Make/Kconfig files which:

  - Have no license information of any form

  These files fall under the project license, GPL v2 only. The resulting SPDX
  license identifier is:

  GPL-2.0-only

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Greg Kroah-Hartman

  Thomas Gleixner

  2019-05-21 16:50:46 +0800  

11 Jun, 2018

1 commit

• 5aadfdeb8   kcov: test compiler capability in Kconfig and correct dependency ... Browse Code »

  As Documentation/kbuild/kconfig-language.txt notes, 'select' should be
  be used with care - it forces a lower limit of another symbol, ignoring
  the dependency. Currently, KCOV can select GCC_PLUGINS even if arch
  does not select HAVE_GCC_PLUGINS. This could cause the unmet direct
  dependency.

  Now that Kconfig can test compiler capability, let's handle this in a
  more sophisticated way.

  There are two ways to enable KCOV; use the compiler that natively
  supports -fsanitize-coverage=trace-pc, or build the SANCOV plugin if
  the compiler has ability to build GCC plugins. Hence, the correct
  dependency for KCOV is:

  depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS

  You do not need to build the SANCOV plugin if the compiler already
  supports -fsanitize-coverage=trace-pc. Hence, the select should be:

  select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC

  With this, GCC_PLUGIN_SANCOV is selected only when necessary, so
  scripts/Makefile.gcc-plugins can be cleaner.

  I also cleaned up Kconfig and scripts/Makefile.kcov as well.

  Signed-off-by: Masahiro Yamada
  Reviewed-by: Kees Cook

  Masahiro Yamada

  2018-06-11 08:14:08 +0800  

18 Nov, 2017

1 commit

• d677a4d60   Makefile: support flag -fsanitizer-coverage=trace-cmp ... Browse Code »

  The flag enables Clang instrumentation of comparison operations
  (currently not supported by GCC). This instrumentation is needed by the
  new KCOV device to collect comparison operands.

  Link: http://lkml.kernel.org/r/20171011095459.70721-2-glider@google.com
  Signed-off-by: Victor Chibotaru
  Signed-off-by: Alexander Potapenko
  Cc: Dmitry Vyukov
  Cc: Andrey Konovalov
  Cc: Mark Rutland
  Cc: Alexander Popov
  Cc: Andrey Ryabinin
  Cc: Kees Cook
  Cc: Vegard Nossum
  Cc: Quentin Casasnovas
  Cc:
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Victor Chibotaru

  2017-11-18 08:10:04 +0800