igt: Mass conversion to to_user_pointer()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/tests/gem_exec_nop.c b/tests/gem_exec_nop.c
index 56298e1..78dccbb 100644
--- a/tests/gem_exec_nop.c
+++ b/tests/gem_exec_nop.c
@@ -67,7 +67,7 @@
 	obj.handle = handle;
 
 	memset(&execbuf, 0, sizeof(execbuf));
-	execbuf.buffers_ptr = (uintptr_t)&obj;
+	execbuf.buffers_ptr = to_user_pointer(&obj);
 	execbuf.buffer_count = 1;
 	execbuf.flags = ring_id;
 	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
@@ -149,7 +149,7 @@
 	obj.handle = handle;
 
 	memset(&execbuf, 0, sizeof(execbuf));
-	execbuf.buffers_ptr = (uintptr_t)&obj;
+	execbuf.buffers_ptr = to_user_pointer(&obj);
 	execbuf.buffer_count = 1;
 	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
 	execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
@@ -217,7 +217,7 @@
 	obj.handle = handle;
 
 	memset(&execbuf, 0, sizeof(execbuf));
-	execbuf.buffers_ptr = (uintptr_t)&obj;
+	execbuf.buffers_ptr = to_user_pointer(&obj);
 	execbuf.buffer_count = 1;
 	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
 	execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;