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rcu: Eliminate synchronize_rcu_mult()

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Now that synchronize_rcu() waits for both RCU read-side critical
sections and preempt-disabled regions of code, the sole caller of
synchronize_rcu_mult() can be replaced by synchronize_rcu().
This patch makes this change and removes synchronize_rcu_mult().
Note that _wait_rcu_gp() still supports synchronize_rcu_mult(),
and thus might be simplified in the future to take only take
a single call_rcu() function rather than the current list of them.

Signed-off-by: Paul E. McKenney <[email protected]>
This commit is contained in:
Paul E. McKenney 2018-07-11 14:36:49 -07:00 • committed by Paul E. McKenney
commit 309ba859b9
3 changed files with 3 additions and 22 deletions
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2
kernel/sched/core.c
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@ -5788,7 +5788,7 @@ int sched_cpu_deactivate(unsigned int cpu)
*
* Do sync before park smpboot threads to take care the rcu boost case.
*/
synchronize_rcu_mult(call_rcu, call_rcu_sched);
synchronize_rcu();
if (!sched_smp_initialized)
return 0;