--- a/kernel/nvidia-uvm/uvm8_tools.c	2019-07-13 15:40:05.865416293 +1000
+++ b/kernel/nvidia-uvm/uvm8_tools.c	2019-07-13 15:48:50.964000591 +1000
@@ -204,18 +204,20 @@
     return event_tracker != NULL && !event_tracker->is_queue;
 }
 
-static void put_user_pages(struct page **pages, NvU64 page_count)
+static void nv_put_user_pages(struct page **pages, NvU64 page_count)
 {
-    NvU64 i;
-    for (i = 0; i < page_count; i++)
-        put_page(pages[i]);
+#if ULONG_MAX == ULLONG_MAX
+    put_user_pages(pages, (unsigned long)page_count);
+#else
+#error "This patch works only for 64 bits machines!"
+#endif
 }
 
 static void unmap_user_pages(struct page **pages, void *addr, NvU64 size)
 {
     size = DIV_ROUND_UP(size, PAGE_SIZE);
     vunmap((NvU8 *)addr);
-    put_user_pages(pages, size);
+    nv_put_user_pages(pages, size);
     uvm_kvfree(pages);
 }
 
@@ -279,7 +281,7 @@
     uvm_kvfree(vmas);
 
     if (ret > 0)
-        put_user_pages(*pages, ret);
+        nv_put_user_pages(*pages, ret);
     else if (ret < 0)
         status = errno_to_nv_status(ret);