Comment 2 for bug 1289923

StacktraceTop:
 list_add (head=0x18, entry=0x7fddd2490b68) at ../../../src/intel_list.h:161
 list_move (head=0x18, list=0x7fddd2490b68) at ../../../src/intel_list.h:248
 __kgem_bo_mark_dirty (bo=0x7fddd2490b40) at ../../../src/sna/kgem.h:636
 kgem_add_reloc (kgem=kgem@entry=0x7fddd08ad000, pos=<optimized out>, bo=<optimized out>, bo@entry=0x7fddd2490b40, read_write_domain=read_write_domain@entry=163842, delta=<optimized out>, delta@entry=0) at ../../../src/sna/kgem.c:5254
 sna_blt_fill_boxes (sna=sna@entry=0x7fddd08ad000, alu=3 '\003', bo=bo@entry=0x7fddd2490b40, bpp=32, pixel=4279505940, box=box@entry=0x7fddd23a65b0, nbox=nbox@entry=2) at ../../../src/sna/sna_blt.c:3132