fbdev_mem_size = *w * *h * 2 * fbdev_buffer_count;
fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
if (fbdev_mem == MAP_FAILED && fbdev_buffer_count > 1) {
fbdev_mem_size = *w * *h * 2 * fbdev_buffer_count;
fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
if (fbdev_mem == MAP_FAILED && fbdev_buffer_count > 1) {