diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-07 16:01:31 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-09 14:40:53 +0100 |
| commit | 2bb8d94fb03f808022c620f54b602a1e26d5cbac (patch) | |
| tree | 9b73be310729f138d4c47e3e51b707144c85aa21 /drivers/cpufreq/cpufreq_ondemand.c | |
| parent | 9be4fd2c7723a3057b0b39676fe4c8d5fd7118a4 (diff) | |
| download | linux-rt-2bb8d94fb03f808022c620f54b602a1e26d5cbac.tar.gz | |
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_ondemand.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index da7f3514d948..fac2f8f05bf8 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -249,7 +249,7 @@ static void update_sampling_rate(struct dbs_data *dbs_data, /* * Lock governor so that governor start/stop can't execute in parallel. */ - mutex_lock(&od_dbs_cdata.mutex); + mutex_lock(&dbs_data_mutex); cpumask_copy(&cpumask, cpu_online_mask); @@ -306,7 +306,7 @@ static void update_sampling_rate(struct dbs_data *dbs_data, } } - mutex_unlock(&od_dbs_cdata.mutex); + mutex_unlock(&dbs_data_mutex); } static ssize_t store_sampling_rate(struct dbs_data *dbs_data, const char *buf, @@ -552,7 +552,6 @@ static struct common_dbs_data od_dbs_cdata = { .gov_ops = &od_ops, .init = od_init, .exit = od_exit, - .mutex = __MUTEX_INITIALIZER(od_dbs_cdata.mutex), }; static int od_cpufreq_governor_dbs(struct cpufreq_policy *policy, |