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-rw-r--r--src/systemd/src/basic/list.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/systemd/src/basic/list.h b/src/systemd/src/basic/list.h
index c3771a17..7006c3e2 100644
--- a/src/systemd/src/basic/list.h
+++ b/src/systemd/src/basic/list.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
 /***
@@ -182,3 +183,6 @@
         for ((i) = (p)->name##_next ? (p)->name##_next : (head);        \
              (i) != (p);                                                \
              (i) = (i)->name##_next ? (i)->name##_next : (head))
+
+#define LIST_IS_EMPTY(head)                                             \
+        (!(head))