Hi Giovanni,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/sched/core]
[cannot apply to v5.4-rc7 next-20191111]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Giovanni-Gherdovich/Add-support-for-frequency-invariance-for-some-x86/20191113-035438
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git a0e813f26ebcb25c0b5e504498fbd796cca1a4ba
config: i386-randconfig-e001-201945 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/cpufreq/intel_pstate.c: In function 'intel_pstate_update_limits':
>> drivers/cpufreq/intel_pstate.c:925:3: error: implicit declaration of function 'set_arch_max_freq' [-Werror=implicit-function-declaration]
      set_arch_max_freq(global.turbo_disabled);
      ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/set_arch_max_freq +925 drivers/cpufreq/intel_pstate.c

   913	
   914	static void intel_pstate_update_limits(unsigned int cpu)
   915	{
   916		mutex_lock(&intel_pstate_driver_lock);
   917	
   918		update_turbo_state();
   919		/*
   920		 * If turbo has been turned on or off globally, policy limits for
   921		 * all CPUs need to be updated to reflect that.
   922		 */
   923		if (global.turbo_disabled_mf != global.turbo_disabled) {
   924			global.turbo_disabled_mf = global.turbo_disabled;
 > 925			set_arch_max_freq(global.turbo_disabled);
   926			for_each_possible_cpu(cpu)
   927				intel_pstate_update_max_freq(cpu);
   928		} else {
   929			cpufreq_update_policy(cpu);
   930		}
   931	
   932		mutex_unlock(&intel_pstate_driver_lock);
   933	}
   934	

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0-DAY kernel test infrastructure                 Open Source Technology Center
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