In file included from /usr/src/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c:31:0:
/usr/src/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c: In function 'amdgpu_flip_work_func':
/usr/src/sys/external/bsd/drm2/dist/include/drm/drmP.h:237:4: error: 'stat' may be used uninitialized in this function [-Werror=maybe-uninitialized]
    drm_ut_debug_printk(__func__, fmt, ##args); \
    ^~~~~~~~~~~~~~~~~~~
/usr/src/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c:81:18: note: 'stat' was declared here
  int vpos, hpos, stat, min_udelay = 0;
                  ^~~~
cc1: all warnings being treated as errors

Index: sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c
===================================================================
RCS file: /cvsroot/src/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c,v
retrieving revision 1.4
diff -u -r1.4 amdgpu_display.c
--- sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c	27 Aug 2018 15:22:54 -0000	1.4
+++ sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_display.c	23 Feb 2019 11:17:11 -0000
@@ -78,7 +78,7 @@
 	struct drm_crtc *crtc = &amdgpuCrtc->base;
 	unsigned long flags;
 	unsigned i, repcnt = 4;
-	int vpos, hpos, stat, min_udelay = 0;
+	int vpos, hpos, stat = 0, min_udelay = 0;
 	struct drm_vblank_crtc *vblank = &crtc->dev->vblank[work->crtc_id];
 
 	amdgpu_flip_wait_fence(adev, &work->excl);