tree 1b549a32b07d72c725c7113bb7ec24fe4337c198
parent 65bfdd36c113f5d579a382d8f2847210ea4cdca6
author Paul E. McKenney <paulmck@kernel.org> 1622740656 -0700
committer Paul E. McKenney <paulmck@kernel.org> 1628282508 -0700

rcu: Mark lockless ->qsmask read in rcu_check_boost_fail()

Accesses to ->qsmask are normally protected by ->lock, but there is an
exception in the diagnostic code in rcu_check_boost_fail().  This commit
therefore applies data_race() to this access to avoid KCSAN complaining
about the C-language writes protected by ->lock.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>