Hi Mahesh, [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on next-20170130] [cannot apply to v4.10-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Mahesh-Kumar/Enable-IPC-WM-related-WA-s/20170131-230708 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-rhel (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): drivers/gpu/drm/i915/intel_pm.c: In function 'skl_compute_memory_bandwidth_wm_wa': >> drivers/gpu/drm/i915/intel_pm.c:4118:56: warning: argument to 'sizeof' in 'memcpy' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memcpy(mem_attr, &dev_priv->wm.skl_hw.mem_attr, sizeof(mem_attr)); ^ vim +4118 drivers/gpu/drm/i915/intel_pm.c 4102 mem_attr->mem_wa = WATERMARK_WA_NONE; 4103 return 0; 4104 } 4105 4106 if (!memdev_info->valid) 4107 goto exit; 4108 4109 /* 4110 * We hold wm_mutex lock, so any other flip can't proceed beyond WM 4111 * calculation step until this flip writes modified WM values. 4112 * So it's safe to read plane_state of other pipes without taking CRTC lock 4113 */ 4114 ret = drm_modeset_lock(&dev_priv->wm.wm_ww_mutex, state->acquire_ctx); 4115 if (ret) 4116 return ret; 4117 > 4118 memcpy(mem_attr, &dev_priv->wm.skl_hw.mem_attr, sizeof(mem_attr)); 4119 4120 for_each_crtc_in_state(state, crtc, cstate, i) { 4121 struct drm_plane *plane; 4122 const struct drm_plane_state *pstate; 4123 int active_planes = 0; 4124 uint32_t max_plane_bw_kbps = 0; 4125 4126 mem_attr->pipe_y_tiled[i] = false; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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