linux-master/lib/test_hmm.c

496 	struct dmirror_chunk *devmem;
504 	devmem = kzalloc(sizeof(*devmem), GFP_KERNEL);
505 	if (!devmem)
514 		devmem->pagemap.range.start = res->start;
515 		devmem->pagemap.range.end = res->end;
516 		devmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
519 		devmem->pagemap.range.start = (MINOR(mdevice->cdevice.dev) - 2) ?
522 		devmem->pagemap.range.end = devmem->pagemap.range.start +
524 		devmem->pagemap.type = MEMORY_DEVICE_COHERENT;
531 	devmem->pagemap.nr_range = 1;
532 	devmem->pagemap.ops = &dmirror_devmem_ops;
533 	devmem->pagemap.owner = mdevice;
551 	ptr = memremap_pages(&devmem->pagemap, numa_node_id());
560 	devmem->mdevice = mdevice;
561 	pfn_first = devmem->pagemap.range.start >> PAGE_SHIFT;
562 	pfn_last = pfn_first + (range_len(&devmem->pagemap.range) >> PAGE_SHIFT);
563 	mdevice->devmem_chunks[mdevice->devmem_count++] = devmem;
591 	if (res && devmem->pagemap.type == MEMORY_DEVICE_PRIVATE)
592 		release_mem_region(devmem->pagemap.range.start,
593 				   range_len(&devmem->pagemap.range));
595 	kfree(devmem);
1258 static void dmirror_remove_free_pages(struct dmirror_chunk *devmem)
1260 	struct dmirror_device *mdevice = devmem->mdevice;
1264 		if (dmirror_page_to_chunk(page) == devmem)
1275 			struct dmirror_chunk *devmem =
1279 			devmem->remove = true;
1280 			dmirror_remove_free_pages(devmem);
1283 			dmirror_device_evict_chunk(devmem);
1284 			memunmap_pages(&devmem->pagemap);
1285 			if (devmem->pagemap.type == MEMORY_DEVICE_PRIVATE)
1286 				release_mem_region(devmem->pagemap.range.start,
1287 						   range_len(&devmem->pagemap.range));
1288 			kfree(devmem);