tree: git://people.freedesktop.org/~airlied/linux.git drm-intel-display-refactor head: cb45bcc9cf97016e5d4edb7a4196f0847437460e commit: 678661f2ff1ba755fc652011d3edb2977165f508 [12/19] drm/i915/display: move display dump/verify code to a separate file config: i386-randconfig-a003-20211012 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add airlied git://people.freedesktop.org/~airlied/linux.git git fetch --no-tags airlied drm-intel-display-refactor git checkout 678661f2ff1ba755fc652011d3edb2977165f508 # save the attached .config to linux build tree make W=1 ARCH=i386

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

All warnings (new ones prefixed by >>):

...

drivers/gpu/drm/i915/display/intel_dump_verify.c:19:1: warning: no previous prototype for 'pipe_config_mismatch' [-Wmissing-prototypes]

19 | pipe_config_mismatch(bool fastset, const struct intel_crtc *crtc, | ^~~~~~~~~~~~~~~~~~~~

vim +/pipe_config_mismatch +19 drivers/gpu/drm/i915/display/intel_dump_verify.c

17 18 void __printf(4, 5)

19 pipe_config_mismatch(bool fastset, const struct intel_crtc *crtc,

20 const char *name, const char *format, ...) 21 { 22 struct drm_i915_private *i915 = to_i915(crtc->base.dev); 23 struct va_format vaf; 24 va_list args; 25 26 va_start(args, format); 27 vaf.fmt = format; 28 vaf.va = &args; 29 30 if (fastset) 31 drm_dbg_kms(&i915->drm, 32 "[CRTC:%d:%s] fastset mismatch in %s %pV\n", 33 crtc->base.base.id, crtc->base.name, name, &vaf); 34 else 35 drm_err(&i915->drm, "[CRTC:%d:%s] mismatch in %s %pV\n", 36 crtc->base.base.id, crtc->base.name, name, &vaf); 37 38 va_end(args); 39 } 40

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