From: Rafael J. Wysocki rafael.j.wysocki@intel.com
commit a62f68f5ca53ab61cba2f0a410d0add7a6d54a52 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/cpufreq/cpufreq.c | 12 ++++++++++++ include/linux/cpufreq.h | 1 + 2 files changed, 13 insertions(+)
--- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1904,6 +1904,18 @@ 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 --- a/include/linux/cpufreq.h +++ b/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);