Commit 49271ca6 authored by Lai Jiangshan's avatar Lai Jiangshan Committed by Paul E. McKenney
Browse files

srcu: Update synchronize_srcu_expedited()'s comments 



Because synchronize_srcu_expedited() no longer uses
synchronize_rcu_sched_expedited(), synchronize_srcu_expedited() no longer
indirectly acquires any CPU-hotplug-related locks.  This commit therefore
updates the comments accordingly.

Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 34a64b6b

kernel/srcu.c

+5 −6
Original line number Diff line number Diff line
@@ -477,12 +477,11 @@ EXPORT_SYMBOL_GPL(synchronize_srcu); 
 * Wait for an SRCU grace period to elapse, but be more aggressive about

 * spinning rather than blocking when waiting.

 *

 * Note that it is illegal to call this function while holding any lock

 * that is acquired by a CPU-hotplug notifier.  It is also illegal to call

 * synchronize_srcu_expedited() from the corresponding SRCU read-side

 * critical section; doing so will result in deadlock.  However, it is

 * perfectly legal to call synchronize_srcu_expedited() on one srcu_struct

 * from some other srcu_struct's read-side critical section, as long as

 * Note that it is also illegal to call synchronize_srcu_expedited()

 * from the corresponding SRCU read-side critical section;

 * doing so will result in deadlock.  However, it is perfectly legal

 * to call synchronize_srcu_expedited() on one srcu_struct from some

 * other srcu_struct's read-side critical section, as long as

 * the resulting graph of srcu_structs is acyclic.

 */

void synchronize_srcu_expedited(struct srcu_struct *sp)