Hi Chris, [auto build test WARNING on drm-intel/for-linux-next] [cannot apply to v4.6-rc1 next-20160330] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Chris-Wilson/drm-i915-Protect-fbdev-across-slow-or-failed-initialisation/20160331-015912 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-randconfig-x015-03310059 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): drivers/gpu/drm/i915/intel_fbdev.c: In function 'intel_fbdev_get_if_active': drivers/gpu/drm/i915/intel_fbdev.c:119:37: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types] struct drm_i915_device *dev_priv = to_i915(dev); ^ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/async.h:15, from drivers/gpu/drm/i915/intel_fbdev.c:27: drivers/gpu/drm/i915/intel_fbdev.c:122:14: error: dereferencing pointer to incomplete type 'struct drm_i915_device' if (dev_priv->fbdev == NULL) ^ include/linux/compiler.h:147:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> drivers/gpu/drm/i915/intel_fbdev.c:122:2: note: in expansion of macro 'if' if (dev_priv->fbdev == NULL) ^ drivers/gpu/drm/i915/intel_fbdev.c:125:9: error: 'ifbdev' undeclared (first use in this function) info = ifbdev->helper.fbdev; ^ drivers/gpu/drm/i915/intel_fbdev.c:125:9: note: each undeclared identifier is reported only once for each function it appears in drivers/gpu/drm/i915/intel_fbdev.c:133:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ vim +/if +122 drivers/gpu/drm/i915/intel_fbdev.c 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * David Airlie 25 */ 26 > 27 #include <linux/async.h> 28 #include <linux/module.h> 29 #include <linux/kernel.h> 30 #include <linux/console.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/tty.h> 35 #include <linux/sysrq.h> 36 #include <linux/delay.h> 37 #include <linux/fb.h> 38 #include <linux/init.h> 39 #include <linux/vga_switcheroo.h> 40 41 #include <drm/drmP.h> 42 #include <drm/drm_crtc.h> 43 #include <drm/drm_fb_helper.h> 44 #include "intel_drv.h" 45 #include <drm/i915_drm.h> 46 #include "i915_drv.h" 47 48 static int intel_fbdev_set_par(struct fb_info *info) 49 { 50 struct drm_fb_helper *fb_helper = info->par; 51 struct intel_fbdev *ifbdev = 52 container_of(fb_helper, struct intel_fbdev, helper); 53 int ret; 54 55 ret = drm_fb_helper_set_par(info); 56 57 if (ret == 0) { 58 mutex_lock(&fb_helper->dev->struct_mutex); 59 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 60 mutex_unlock(&fb_helper->dev->struct_mutex); 61 } 62 63 return ret; 64 } 65 66 static int intel_fbdev_blank(int blank, struct fb_info *info) 67 { 68 struct drm_fb_helper *fb_helper = info->par; 69 struct intel_fbdev *ifbdev = 70 container_of(fb_helper, struct intel_fbdev, helper); 71 int ret; 72 73 ret = drm_fb_helper_blank(blank, info); 74 75 if (ret == 0) { 76 mutex_lock(&fb_helper->dev->struct_mutex); 77 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 78 mutex_unlock(&fb_helper->dev->struct_mutex); 79 } 80 81 return ret; 82 } 83 84 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 85 struct fb_info *info) 86 { 87 struct drm_fb_helper *fb_helper = info->par; 88 struct intel_fbdev *ifbdev = 89 container_of(fb_helper, struct intel_fbdev, helper); 90 91 int ret; 92 ret = drm_fb_helper_pan_display(var, info); 93 94 if (ret == 0) { 95 mutex_lock(&fb_helper->dev->struct_mutex); 96 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 97 mutex_unlock(&fb_helper->dev->struct_mutex); 98 } 99 100 return ret; 101 } 102 103 static struct fb_ops intelfb_ops = { 104 .owner = THIS_MODULE, 105 .fb_check_var = drm_fb_helper_check_var, 106 .fb_set_par = intel_fbdev_set_par, 107 .fb_fillrect = drm_fb_helper_cfb_fillrect, 108 .fb_copyarea = drm_fb_helper_cfb_copyarea, 109 .fb_imageblit = drm_fb_helper_cfb_imageblit, 110 .fb_pan_display = intel_fbdev_pan_display, 111 .fb_blank = intel_fbdev_blank, 112 .fb_setcmap = drm_fb_helper_setcmap, 113 .fb_debug_enter = drm_fb_helper_debug_enter, 114 .fb_debug_leave = drm_fb_helper_debug_leave, 115 }; 116 117 static struct intel_fbdev *intel_fbdev_get_if_active(struct drm_device *dev) 118 { 119 struct drm_i915_device *dev_priv = to_i915(dev); 120 struct fb_info *info; 121 > 122 if (dev_priv->fbdev == NULL) 123 return NULL; 124 125 info = ifbdev->helper.fbdev; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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