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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2017-01-23 07:41:41 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-01-30 11:22:20 +0300 |
| commit | 37a73ec0c9bbd712d24cc2035696893e5b6119a5 (patch) | |
| tree | f26471abf34316fc58ea9fbb19e5eaba2f4f0d78 /drivers/base/power/opp/opp.h | |
| parent | b6160e26936bcf1b9181bb34ad4f420ccd3f39f0 (diff) | |
| download | linux-37a73ec0c9bbd712d24cc2035696893e5b6119a5.tar.xz | |
PM / OPP: Add per OPP table mutex
Add per OPP table lock to protect opp_table->opp_list.
Note that at few places opp_list is used under the rcu_read_lock() and
so a mutex can't be added there for now. This will be fixed by a later
patch.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power/opp/opp.h')
| -rw-r--r-- | drivers/base/power/opp/opp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h index 0a5eb4d1e8f7..105243b06373 100644 --- a/drivers/base/power/opp/opp.h +++ b/drivers/base/power/opp/opp.h @@ -131,6 +131,7 @@ enum opp_table_access { * @rcu_head: RCU callback head used for deferred freeing * @dev_list: list of devices that share these OPPs * @opp_list: table of opps + * @lock: mutex protecting the opp_list. * @np: struct device_node pointer for opp's DT node. * @clock_latency_ns_max: Max clock latency in nanoseconds. * @shared_opp: OPP is shared between multiple devices. @@ -163,6 +164,7 @@ struct opp_table { struct rcu_head rcu_head; struct list_head dev_list; struct list_head opp_list; + struct mutex lock; struct device_node *np; unsigned long clock_latency_ns_max; |