diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2024-06-14 13:26:44 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2024-06-18 10:13:37 -0700 |
| commit | e206f33e2c0774276a0497fe538472e12016a362 (patch) | |
| tree | 780fd57184e3c55aa2cf9a48d90e5a98a9d622a5 /kernel/rcu/srcutree.c | |
| parent | d7b0615cb8d24737df436c9c00788c0f35e02c7b (diff) | |
srcu: Fill out polled grace-period APIs
This commit adds the get_completed_synchronize_srcu() and the
same_state_synchronize_srcu() functions. The first returns a cookie
that is always interpreted as corresponding to an expired grace period.
The second does an equality comparison of a pair of cookies.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'kernel/rcu/srcutree.c')
| -rw-r--r-- | kernel/rcu/srcutree.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 15dc22a8ff5a..d6a4047719cb 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -1543,7 +1543,8 @@ EXPORT_SYMBOL_GPL(start_poll_synchronize_srcu); */ bool poll_state_synchronize_srcu(struct srcu_struct *ssp, unsigned long cookie) { - if (!rcu_seq_done(&ssp->srcu_sup->srcu_gp_seq, cookie)) + if (cookie != SRCU_GET_STATE_COMPLETED && + !rcu_seq_done(&ssp->srcu_sup->srcu_gp_seq, cookie)) return false; // Ensure that the end of the SRCU grace period happens before // any subsequent code that the caller might execute. |