838 	struct userfaultfd_unmap_ctx *unmap_ctx;  in has_unmap_ctx()  local
840 	list_for_each_entry(unmap_ctx, unmaps, list)  in has_unmap_ctx()
841 		if (unmap_ctx->ctx == ctx && unmap_ctx->start == start &&  in has_unmap_ctx()
842 		    unmap_ctx->end == end)  in has_unmap_ctx()
851 	struct userfaultfd_unmap_ctx *unmap_ctx;  in userfaultfd_unmap_prep()  local
858 	unmap_ctx = kzalloc(sizeof(*unmap_ctx), GFP_KERNEL);  in userfaultfd_unmap_prep()
859 	if (!unmap_ctx)  in userfaultfd_unmap_prep()
864 	unmap_ctx->ctx = ctx;  in userfaultfd_unmap_prep()
865 	unmap_ctx->start = start;  in userfaultfd_unmap_prep()
866 	unmap_ctx->end = end;  in userfaultfd_unmap_prep()
867 	list_add_tail(&unmap_ctx->list, unmaps);  in userfaultfd_unmap_prep()