[v2,3/4] cpufreq: Introduce cpufreq_driver_test_flags()
diff mbox series

Message ID 28638601.XPu5T7AxD8@kreacher
State New, archived
Headers show
Series
  • cpufreq: intel_pstate: Avoid missing HWP max limit updates with powersave governor
Related show

Commit Message

Rafael J. Wysocki Oct. 23, 2020, 3:35 p.m. UTC
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add a helper function to test the flags of the cpufreq driver in use
againt a given flags mask.

In particular, this will be needed to test the
CPUFREQ_NEED_UPDATE_LIMITS cpufreq driver flag in the schedutil
governor.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

New patch in v2.

---
 drivers/cpufreq/cpufreq.c |   12 ++++++++++++
 include/linux/cpufreq.h   |    1 +
 2 files changed, 13 insertions(+)

Patch
diff mbox series

Index: linux-pm/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq.c
+++ linux-pm/drivers/cpufreq/cpufreq.c
@@ -1909,6 +1909,18 @@  void cpufreq_resume(void)
 }
 
 /**
+ * cpufreq_driver_test_flags - Test cpufreq driver's flags against given ones.
+ * @flags: Flags to test against the current cpufreq driver's flags.
+ *
+ * Assumes that the driver is there, so callers must ensure that this is the
+ * case.
+ */
+bool cpufreq_driver_test_flags(u16 flags)
+{
+	return !!(cpufreq_driver->flags & flags);
+}
+
+/**
  *	cpufreq_get_current_driver - return current driver's name
  *
  *	Return the name string of the currently loaded cpufreq driver
Index: linux-pm/include/linux/cpufreq.h
===================================================================
--- linux-pm.orig/include/linux/cpufreq.h
+++ linux-pm/include/linux/cpufreq.h
@@ -428,6 +428,7 @@  struct cpufreq_driver {
 int cpufreq_register_driver(struct cpufreq_driver *driver_data);
 int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
 
+bool cpufreq_driver_test_flags(u16 flags);
 const char *cpufreq_get_current_driver(void);
 void *cpufreq_get_driver_data(void);