Re: [GIT PULL kcsan] KCSAN commits for v5.10

[Ingo Molnar]

* Paul E. McKenney <paulmck@xxxxxxxxxx> wrote:

> Hello, Ingo!
> 
> This pull request contains KCSAN updates for v5.10.  These have been
> subjected to LKML review, most recently here:
> 
> 	https://lore.kernel.org/lkml/20200831181715.GA1530@paulmck-ThinkPad-P72
> 
> All of these have also been subjected to the kbuild test robot and
> -next testing.  The following changes since v5.9-rc1 are available in
> the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git kcsan
> 
> for you to fetch changes up to cd290ec24633f51029dab0d25505fae7da0e1eda:
> 
>   kcsan: Use tracing-safe version of prandom (2020-08-30 21:50:13 -0700)
> 
> ----------------------------------------------------------------
> Marco Elver (19):
>       kcsan: Add support for atomic builtins
>       objtool: Add atomic builtin TSAN instrumentation to uaccess whitelist
>       kcsan: Add atomic builtin test case
>       kcsan: Support compounded read-write instrumentation
>       objtool, kcsan: Add __tsan_read_write to uaccess whitelist
>       kcsan: Skew delay to be longer for certain access types
>       kcsan: Add missing CONFIG_KCSAN_IGNORE_ATOMICS checks
>       kcsan: Test support for compound instrumentation
>       instrumented.h: Introduce read-write instrumentation hooks
>       asm-generic/bitops: Use instrument_read_write() where appropriate
>       locking/atomics: Use read-write instrumentation for atomic RMWs
>       kcsan: Simplify debugfs counter to name mapping
>       kcsan: Simplify constant string handling
>       kcsan: Remove debugfs test command
>       kcsan: Show message if enabled early
>       kcsan: Use pr_fmt for consistency
>       kcsan: Optimize debugfs stats counters
>       bitops, kcsan: Partially revert instrumentation for non-atomic bitops
>       kcsan: Use tracing-safe version of prandom
> 
>  include/asm-generic/atomic-instrumented.h          | 330 ++++++++++-----------
>  include/asm-generic/bitops/instrumented-atomic.h   |   6 +-
>  include/asm-generic/bitops/instrumented-lock.h     |   2 +-
>  .../asm-generic/bitops/instrumented-non-atomic.h   |  30 +-
>  include/linux/instrumented.h                       |  30 ++
>  include/linux/kcsan-checks.h                       |  45 ++-
>  kernel/kcsan/core.c                                | 210 +++++++++++--
>  kernel/kcsan/debugfs.c                             | 130 ++------
>  kernel/kcsan/kcsan-test.c                          | 128 +++++++-
>  kernel/kcsan/kcsan.h                               |  12 +-
>  kernel/kcsan/report.c                              |  10 +-
>  kernel/kcsan/selftest.c                            |   8 +-
>  lib/Kconfig.kcsan                                  |   5 +
>  scripts/Makefile.kcsan                             |   2 +-
>  scripts/atomic/gen-atomic-instrumented.sh          |  21 +-
>  tools/objtool/check.c                              |  55 ++++
>  16 files changed, 677 insertions(+), 347 deletions(-)

Pulled into tip:locking/core, thanks a lot Paul!

	Ingo