tree 1b60ff8c706492148c64d04285e1eeadc11035c8
parent 3b15c92c866c43af51a5b2b98cccabd979cd449d
author Paul E. McKenney <paulmck@kernel.org> 1578440919 -0800
committer Paul E. McKenney <paulmck@kernel.org> 1578440919 -0800

rcu: Add READ_ONCE() to rcu_data ->gpwrap

The rcu_data structure's ->gpwrap field is read locklessly, and so
this commit adds the required READ_ONCE() to a pair of laods in order
to avoid destructive compiler optimizations.

This data race was reported by KCSAN.

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