Commit ed42c380 authored by Neeraj Upadhyay's avatar Neeraj Upadhyay Committed by Paul E. McKenney
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rcu-tasks: Fix read-side primitives comment for call_rcu_tasks_trace 



call_rcu_tasks_trace() does have read-side primitives - rcu_read_lock_trace()
and rcu_read_unlock_trace(). Fix this information in the comments.

Signed-off-by: default avatarNeeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent a6517e9c

kernel/rcu/tasks.h

+6 −10
Original line number Diff line number Diff line
@@ -1207,15 +1207,11 @@ static void exit_tasks_rcu_finish_trace(struct task_struct *t) 
 * @rhp: structure to be used for queueing the RCU updates.

 * @func: actual callback function to be invoked after the grace period

 *

 * The callback function will be invoked some time after a full grace

 * period elapses, in other words after all currently executing RCU

 * read-side critical sections have completed. call_rcu_tasks_trace()

 * assumes that the read-side critical sections end at context switch,

 * cond_resched_rcu_qs(), or transition to usermode execution.  As such,

 * there are no read-side primitives analogous to rcu_read_lock() and

 * rcu_read_unlock() because this primitive is intended to determine

 * that all tasks have passed through a safe state, not so much for

 * data-structure synchronization.

 * The callback function will be invoked some time after a trace rcu-tasks

 * grace period elapses, in other words after all currently executing

 * trace rcu-tasks read-side critical sections have completed. These

 * read-side critical sections are delimited by calls to rcu_read_lock_trace()

 * and rcu_read_unlock_trace().

 *

 * See the description of call_rcu() for more detailed information on

 * memory ordering guarantees.
@@ -1231,7 +1227,7 @@ EXPORT_SYMBOL_GPL(call_rcu_tasks_trace); 
 *

 * Control will return to the caller some time after a trace rcu-tasks

 * grace period has elapsed, in other words after all currently executing

 * rcu-tasks read-side critical sections have elapsed.  These read-side

 * trace rcu-tasks read-side critical sections have elapsed. These read-side

 * critical sections are delimited by calls to rcu_read_lock_trace()

 * and rcu_read_unlock_trace().

 *