eraser
wacom_wac->hid_data.eraser |= value;
wacom_wac->hid_data.eraser |= value;
if (wacom_wac->hid_data.eraser)
wacom_wac->hid_data.eraser = false;
bool eraser;
if (allocator->eraser != NULL)
dm_kcopyd_client_destroy(vdo_forget(allocator->eraser));
dm_kcopyd_zero(allocator->eraser, 1, regions, 0, copy_callback, allocator);
allocator->eraser = dm_kcopyd_client_create(NULL);
if (IS_ERR(allocator->eraser)) {
PTR_ERR(allocator->eraser));
allocator->eraser = NULL;
if (allocator->eraser != NULL)
dm_kcopyd_client_destroy(vdo_forget(allocator->eraser));
struct dm_kcopyd_client *eraser;
eraser(c, tty);