linux-kernel - Re: [PATCH kcsan 0/10] KCSAN updates for v5.9

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Message-ID: <20200624190236.GA6603@paulmck-ThinkPad-P72>
Date:   Wed, 24 Jun 2020 12:02:36 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com,
        kernel-team@...com, mingo@...nel.org
Cc:     elver@...gle.com, andreyknvl@...gle.com, glider@...gle.com,
        dvyukov@...gle.com, cai@....pw, boqun.feng@...il.com
Subject: Re: [PATCH kcsan 0/10] KCSAN updates for v5.9

On Mon, Jun 22, 2020 at 05:43:10PM -0700, Paul E. McKenney wrote:
> Hello!
> 
> This series provides KCSAN updates:

And three more, so that GCC can join Clang in the KCSAN fun.

> 1.	Annotate a data race in vm_area_dup(), courtesy of Qian Cai.
> 
> 2.	x86/mm/pat: Mark an intentional data race, courtesy of Qian Cai.
> 
> 3.	Add ASSERT_EXCLUSIVE_ACCESS() to __list_splice_init_rcu().
> 
> 4.	Add test suite, courtesy of Marco Elver.
> 
> 5.	locking/osq_lock: Annotate a data race in osq_lock.
> 
> 6.	Prefer '__no_kcsan inline' in test, courtesy of Marco Elver.
> 
> 7.	Silence -Wmissing-prototypes warning with W=1, courtesy of Qian Cai.
> 
> 8.	Rename test.c to selftest.c, courtesy of Marco Elver.
> 
> 9.	Remove existing special atomic rules, courtesy of Marco Elver.
> 
> 10.	Add jiffies test to test suite, courtesy of Marco Elver.

11.	Re-add GCC as a supported compiler.

12.	Simplify compiler flags.

13.	Disable branch tracing in core runtime.

Please note that using GCC for KCSAN requires building your own compiler
from recent mainline.

							Thanx, Paul

------------------------------------------------------------------------
The added three (#11-#13) only:
------------------------------------------------------------------------

 Documentation/dev-tools/kcsan.rst |    3 ++-
 kernel/kcsan/Makefile             |    6 +++---
 lib/Kconfig.kcsan                 |    3 ++-
 scripts/Makefile.kcsan            |    2 +-
 4 files changed, 8 insertions(+), 6 deletions(-)