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srcutiny: Mark read-side data races

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This commit marks some interrupt-induced read-side data races in
__srcu_read_lock(), __srcu_read_unlock(), and srcu_torture_stats_print().

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney
2021-06-02 16:31:38 -07:00
parent b169246feb
commit 65bfdd36c1
2 changed files with 5 additions and 5 deletions
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2
kernel/rcu/srcutiny.c
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@@ -96,7 +96,7 @@ EXPORT_SYMBOL_GPL(cleanup_srcu_struct);
*/
void __srcu_read_unlock(struct srcu_struct *ssp, int idx)
{
int newval = ssp->srcu_lock_nesting[idx] - 1;
int newval = READ_ONCE(ssp->srcu_lock_nesting[idx]) - 1;
WRITE_ONCE(ssp->srcu_lock_nesting[idx], newval);
if (!newval && READ_ONCE(ssp->srcu_gp_waiting))