Patchwork [tip:core/rcu] cpufreq/intel_pstate: Replace synchronize_sched() with synchronize_rcu()

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Submitter tip-bot for Borislav Petkov
Date Dec. 4, 2018, 10:40 p.m.
Message ID <tip-09659af30860789b6f7d1c7dd35a7e829d530db5@git.kernel.org>
Download mbox | patch
Permalink /patch/672439/
State New
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tip-bot for Borislav Petkov - Dec. 4, 2018, 10:40 p.m.
Commit-ID:  09659af30860789b6f7d1c7dd35a7e829d530db5
Gitweb:     https://git.kernel.org/tip/09659af30860789b6f7d1c7dd35a7e829d530db5
Author:     Paul E. McKenney <paulmck@linux.ibm.com>
AuthorDate: Mon, 5 Nov 2018 17:17:47 -0800
Committer:  Paul E. McKenney <paulmck@linux.ibm.com>
CommitDate: Tue, 27 Nov 2018 09:21:38 -0800

cpufreq/intel_pstate: Replace synchronize_sched() with synchronize_rcu()

Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu().  This commit therefore makes this change.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: <linux-pm@vger.kernel.org>
---
 drivers/cpufreq/intel_pstate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 9578312e43f2..ed124d72db76 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1930,7 +1930,7 @@  static void intel_pstate_clear_update_util_hook(unsigned int cpu)
 
 	cpufreq_remove_update_util_hook(cpu);
 	cpu_data->update_util_set = false;
-	synchronize_sched();
+	synchronize_rcu();
 }
 
 static int intel_pstate_get_max_freq(struct cpudata *cpu)