[Intel-gfx] [PATCH 08/27] drm/i915/pxp: Read register to check hardware session state

[kernel test robot]

Hi Sean,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20201113]
[also build test WARNING on v5.10-rc3]
[cannot apply to drm-intel/for-linux-next char-misc/char-misc-testing v5.10-rc3 v5.10-rc2 v5.10-rc1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Sean-Z-Huang/drm-i915-pxp-Introduce-Intel-PXP-component/20201114-094926
base:    92edc4aef86780a8ad01b092c6d6630bb3cb423d
config: x86_64-randconfig-a004-20201113 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9a85643cd357e412cff69067bb5c4840e228c2ab)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/c0c82470e52f95847f54cd65e470ba01a13d71ab
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sean-Z-Huang/drm-i915-pxp-Introduce-Intel-PXP-component/20201114-094926
        git checkout c0c82470e52f95847f54cd65e470ba01a13d71ab
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/pxp/intel_pxp_sm.c:13:5: warning: no previous prototype for function 'pxp_sm_reg_read' [-Wmissing-prototypes]
   int pxp_sm_reg_read(struct drm_i915_private *i915, u32 offset, u32 *regval)
       ^
   drivers/gpu/drm/i915/pxp/intel_pxp_sm.c:13:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int pxp_sm_reg_read(struct drm_i915_private *i915, u32 offset, u32 *regval)
   ^
   static 
   drivers/gpu/drm/i915/pxp/intel_pxp_sm.c:162:12: warning: unused function 'sync_hw_sw_state' [-Wunused-function]
   static int sync_hw_sw_state(struct drm_i915_private *i915, int session_index, int session_type)
              ^
   drivers/gpu/drm/i915/pxp/intel_pxp_sm.c:195:13: warning: unused function 'check_if_protected_type0_sessions_are_attacked' [-Wunused-function]
   static bool check_if_protected_type0_sessions_are_attacked(struct drm_i915_private *i915)
               ^
   3 warnings generated.

vim +/pxp_sm_reg_read +13 drivers/gpu/drm/i915/pxp/intel_pxp_sm.c

    12	
  > 13	int pxp_sm_reg_read(struct drm_i915_private *i915, u32 offset, u32 *regval)
    14	{
    15		intel_wakeref_t wakeref;
    16		int err = 0;
    17	
    18		if (!i915 || !regval) {
    19			err = -EINVAL;
    20			drm_dbg(&i915->drm, "Failed to %s bad params\n", __func__);
    21			goto end;
    22		}
    23	
    24		with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
    25			i915_reg_t reg_offset = {offset};
    26			*regval = intel_uncore_read(&i915->uncore, reg_offset);
    27		}
    28	end:
    29		return err;
    30	}
    31	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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