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| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-03-08 18:34:04 +0100 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-04-11 17:57:15 +0200 |
| commit | dfd458a95d78ce31855fe06bbfde4f4fe60c40db (patch) | |
| tree | 2347aedc6097bb180fc554386dd21d8b4b8b1f32 /kernel/rcu/tree.h | |
| parent | 39cd87c4eb2b893354f3b850f916353f2658ae6f (diff) | |
rcu: Add data structures for synchronize_rcu()
The synchronize_rcu() call is going to be reworked, thus
this patch adds dedicated fields into the rcu_state structure.
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index df48160b3136..b942b9437438 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -315,6 +315,13 @@ do { \ __set_current_state(TASK_RUNNING); \ } while (0) +#define SR_NORMAL_GP_WAIT_HEAD_MAX 5 + +struct sr_wait_node { + atomic_t inuse; + struct llist_node node; +}; + /* * RCU global state, including node hierarchy. This hierarchy is * represented in "heap" form in a dense array. The root (first level) @@ -400,6 +407,13 @@ struct rcu_state { /* Synchronize offline with */ /* GP pre-initialization. */ int nocb_is_setup; /* nocb is setup from boot */ + + /* synchronize_rcu() part. */ + struct llist_head srs_next; /* request a GP users. */ + struct llist_node *srs_wait_tail; /* wait for GP users. */ + struct llist_node *srs_done_tail; /* ready for GP users. */ + struct sr_wait_node srs_wait_nodes[SR_NORMAL_GP_WAIT_HEAD_MAX]; + struct work_struct srs_cleanup_work; }; /* Values for rcu_state structure's gp_flags field. */ |