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cpufreq: Introduce cpufreq_driver_test_flags()

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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>
This commit is contained in:
Rafael J. Wysocki 2020-10-23 17:35:46 +02:00
parent 00d4394792
commit a62f68f5ca
2 changed files with 13 additions and 0 deletions
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12
drivers/cpufreq/cpufreq.c
View File

@ -1907,6 +1907,18 @@ 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 * cpufreq_get_current_driver - return current driver's name
* *

1
include/linux/cpufreq.h
View File

@ -433,6 +433,7 @@ struct cpufreq_driver {
int cpufreq_register_driver(struct cpufreq_driver *driver_data); int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_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); const char *cpufreq_get_current_driver(void);
void *cpufreq_get_driver_data(void); void *cpufreq_get_driver_data(void);