add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/cpufreq/cpufreq_governor.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * drivers/cpufreq/cpufreq_governor.c
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  *
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@@ -8,10 +9,6 @@
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  *		(C) 2003 Jun Nakajima <jun.nakajima@intel.com>
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  *		(C) 2009 Alexander Clouter <alex@digriz.org.uk>
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  *		(c) 2012 Viresh Kumar <viresh.kumar@linaro.org>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -29,7 +26,7 @@
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 static DEFINE_MUTEX(gov_dbs_data_mutex);
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 /* Common sysfs tunables */
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-/**
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+/*
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  * store_sampling_rate - update sampling rate effective immediately if needed.
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  *
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  * If new rate is smaller than the old, simply updating
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@@ -108,7 +105,7 @@
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 			j_cdbs->prev_cpu_idle = get_cpu_idle_time(j, &j_cdbs->prev_update_time,
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 								  dbs_data->io_is_busy);
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 			if (dbs_data->ignore_nice_load)
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-				j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
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+				j_cdbs->prev_cpu_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j);
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 		}
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 	}
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 }
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@@ -152,7 +149,7 @@
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 		j_cdbs->prev_cpu_idle = cur_idle_time;
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 		if (ignore_nice) {
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-			u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
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+			u64 cur_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j);
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 			idle_time += div_u64(cur_nice - j_cdbs->prev_cpu_nice, NSEC_PER_USEC);
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 			j_cdbs->prev_cpu_nice = cur_nice;
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@@ -346,7 +343,7 @@
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 	for_each_cpu(i, policy->cpus)
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 		cpufreq_remove_update_util_hook(i);
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-	synchronize_sched();
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+	synchronize_rcu();
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 }
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 static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *policy,
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@@ -533,7 +530,7 @@
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 		j_cdbs->prev_load = 0;
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 		if (ignore_nice)
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-			j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
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+			j_cdbs->prev_cpu_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j);
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 	}
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 	gov->start(policy);