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rcu: Add test code for semaphore-like SRCU readers

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This commit adds trivial test code for srcu_down_read() and
srcu_up_read().

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2022-11-25 08:42:02 -08:00
parent 0b1182bde3
commit efa3c40cfa
1 changed files with 3 additions and 0 deletions
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3
kernel/rcu/update.c
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@ -555,9 +555,12 @@ struct early_boot_kfree_rcu {
static void early_boot_test_call_rcu(void)
{
static struct rcu_head head;
int idx;
static struct rcu_head shead;
struct early_boot_kfree_rcu *rhp;
idx = srcu_down_read(&early_srcu);
srcu_up_read(&early_srcu, idx);
call_rcu(&head, test_callback);
early_srcu_cookie = start_poll_synchronize_srcu(&early_srcu);
call_srcu(&early_srcu, &shead, test_callback);