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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-02-07 18:01:31 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-03-09 16:40:53 +0300
commit2bb8d94fb03f808022c620f54b602a1e26d5cbac (patch)
tree9b73be310729f138d4c47e3e51b707144c85aa21 /drivers/cpufreq/cpufreq_governor.h
parent9be4fd2c7723a3057b0b39676fe4c8d5fd7118a4 (diff)
downloadlinux-2bb8d94fb03f808022c620f54b602a1e26d5cbac.tar.xz
cpufreq: governor: Use common mutex for dbs_data protection
Every governor relying on the common code in cpufreq_governor.c has to provide its own mutex in struct common_dbs_data. However, there actually is no need to have a separate mutex per governor for this purpose, they may be using the same global mutex just fine. Accordingly, introduce a single common mutex for that and drop the mutex field from struct common_dbs_data. That at least will ensure that the mutex is always present and initialized regardless of what the particular governors do. Another benefit is that the common code does not need a pointer to a governor-related structure to get to the mutex which sometimes helps. Finally, it makes the code generally easier to follow. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Saravana Kannan <skannan@codeaurora.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
-rw-r--r--drivers/cpufreq/cpufreq_governor.h6
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index 541777192dbc..a9df62e87fcb 100644
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -228,11 +228,6 @@ struct common_dbs_data {
/* Governor specific ops, see below */
void *gov_ops;
-
- /*
- * Protects governor's data (struct dbs_data and struct common_dbs_data)
- */
- struct mutex mutex;
};
/* Governor Per policy data */
@@ -277,6 +272,7 @@ static ssize_t show_sampling_rate_min_gov_pol \
return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \
}
+extern struct mutex dbs_data_mutex;
extern struct mutex cpufreq_governor_lock;
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
int cpufreq_governor_dbs(struct cpufreq_policy *policy,