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doc: Update information about resched_cpu 

Since commit fced9c8cfe ("rcu: Avoid resched_cpu() when rescheduling
the current CPU"), resched_cpu is not directly called from
sync_sched_exp_handler. Update the documentation about the same.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: <kernel-team@android.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
This commit is contained in:
Joel Fernandes (Google) 2018-09-25 11:25:57 -07:00 committed by Paul E. McKenney
parent dd944caa81
commit 5cc379a42a
1 changed files with 3 additions and 3 deletions
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Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
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@ -160,9 +160,9 @@ was in flight.
If the CPU is idle, then <tt>sync_sched_exp_handler()</tt> reports If the CPU is idle, then <tt>sync_sched_exp_handler()</tt> reports
the quiescent state. the quiescent state.
<p> <p> Otherwise, the handler forces a future context switch by setting the
Otherwise, the handler invokes <tt>resched_cpu()</tt>, which forces NEED_RESCHED flag of the current task's thread flag and the CPU preempt
a future context switch. counter.
At the time of the context switch, the CPU reports the quiescent state. At the time of the context switch, the CPU reports the quiescent state.
Should the CPU go offline first, it will report the quiescent state Should the CPU go offline first, it will report the quiescent state
at that time. at that time.