drbd_md_get_buffer
buffer = drbd_md_get_buffer(device, __func__);
extern void *drbd_md_get_buffer(struct drbd_device *device, const char *intent);
buffer = drbd_md_get_buffer(device, __func__);
buffer = drbd_md_get_buffer(device, __func__);
buffer = drbd_md_get_buffer(device, __func__); /* Lock meta-data IO */
buffer = drbd_md_get_buffer(device, __func__);