Re: [PATCH 11/11] cpufreq: intel_pstate: Use CPPC to get max performance

[kbuild test robot <lkp@intel.com>]

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Hi Srinivas,

[auto build test ERROR on pm/linux-next]
[also build test ERROR on v4.8-rc3 next-20160822]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Srinivas-Pandruvada/Support-Intel-Turbo-Boost-Max-Technology-3-0/20160819-101955
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-randconfig-h0-08210914 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/acpi/cppc_acpi.c: In function 'cpc_read':
>> drivers/acpi/cppc_acpi.c:731:11: error: implicit declaration of function 'readq_relaxed' [-Werror=implicit-function-declaration]
       *val = readq_relaxed(vaddr);
              ^~~~~~~~~~~~~
   drivers/acpi/cppc_acpi.c: In function 'cpc_write':
>> drivers/acpi/cppc_acpi.c:764:4: error: implicit declaration of function 'writeq_relaxed' [-Werror=implicit-function-declaration]
       writeq_relaxed(val, vaddr);
       ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/readq_relaxed +731 drivers/acpi/cppc_acpi.c

beee23ae Prakash, Prashanth  2016-02-17  725  			*val = readw_relaxed(vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  726  			break;
77e3d86f Prakash, Prashanth  2016-02-17  727  		case 32:
beee23ae Prakash, Prashanth  2016-02-17  728  			*val = readl_relaxed(vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  729  			break;
77e3d86f Prakash, Prashanth  2016-02-17  730  		case 64:
beee23ae Prakash, Prashanth  2016-02-17 @731  			*val = readq_relaxed(vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  732  			break;
77e3d86f Prakash, Prashanth  2016-02-17  733  		default:
77e3d86f Prakash, Prashanth  2016-02-17  734  			pr_debug("Error: Cannot read %u bit width from PCC\n",
77e3d86f Prakash, Prashanth  2016-02-17  735  				reg->bit_width);
77e3d86f Prakash, Prashanth  2016-02-17  736  			ret_val = -EFAULT;
77e3d86f Prakash, Prashanth  2016-02-17  737  		}
c39ec8bd Srinivas Pandruvada 2016-08-18  738  	} else if (reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
c39ec8bd Srinivas Pandruvada 2016-08-18  739  		ret_val = cpc_read_ffh(cpunum, reg, val);
77e3d86f Prakash, Prashanth  2016-02-17  740  	} else
77e3d86f Prakash, Prashanth  2016-02-17  741  		ret_val = acpi_os_read_memory((acpi_physical_address)reg->address,
337aadff Ashwin Chaugule     2015-10-02  742  					val, reg->bit_width);
77e3d86f Prakash, Prashanth  2016-02-17  743  	return ret_val;
337aadff Ashwin Chaugule     2015-10-02  744  }
337aadff Ashwin Chaugule     2015-10-02  745  
c39ec8bd Srinivas Pandruvada 2016-08-18  746  static int cpc_write(int cpunum, struct cpc_reg *reg, u64 val)
337aadff Ashwin Chaugule     2015-10-02  747  {
77e3d86f Prakash, Prashanth  2016-02-17  748  	int ret_val = 0;
77e3d86f Prakash, Prashanth  2016-02-17  749  
77e3d86f Prakash, Prashanth  2016-02-17  750  	if (reg->space_id == ACPI_ADR_SPACE_PLATFORM_COMM) {
77e3d86f Prakash, Prashanth  2016-02-17  751  		void __iomem *vaddr = GET_PCC_VADDR(reg->address);
337aadff Ashwin Chaugule     2015-10-02  752  
77e3d86f Prakash, Prashanth  2016-02-17  753  		switch (reg->bit_width) {
77e3d86f Prakash, Prashanth  2016-02-17  754  		case 8:
beee23ae Prakash, Prashanth  2016-02-17  755  			writeb_relaxed(val, vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  756  			break;
77e3d86f Prakash, Prashanth  2016-02-17  757  		case 16:
beee23ae Prakash, Prashanth  2016-02-17  758  			writew_relaxed(val, vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  759  			break;
77e3d86f Prakash, Prashanth  2016-02-17  760  		case 32:
beee23ae Prakash, Prashanth  2016-02-17  761  			writel_relaxed(val, vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  762  			break;
77e3d86f Prakash, Prashanth  2016-02-17  763  		case 64:
beee23ae Prakash, Prashanth  2016-02-17 @764  			writeq_relaxed(val, vaddr);
77e3d86f Prakash, Prashanth  2016-02-17  765  			break;
77e3d86f Prakash, Prashanth  2016-02-17  766  		default:
77e3d86f Prakash, Prashanth  2016-02-17  767  			pr_debug("Error: Cannot write %u bit width to PCC\n",

:::::: The code at line 731 was first introduced by commit
:::::: beee23aebc6650609ef1547f6d813fa5065f74aa ACPI / CPPC: replace writeX/readX to PCC with relaxed version

:::::: TO: Prakash, Prashanth <pprakash@codeaurora.org>
:::::: CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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