1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/once_lite.h b/include/linux/once_lite.h
new file mode 100644
index 000000000000..861e606b820f
--- /dev/null
+++ b/include/linux/once_lite.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_ONCE_LITE_H
+#define _LINUX_ONCE_LITE_H
+
+#include <linux/types.h>
+
+/* Call a function once. Similar to DO_ONCE(), but does not use jump label
+ * patching via static keys.
+ */
+#define DO_ONCE_LITE(func, ...)						\
+	DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
+#define DO_ONCE_LITE_IF(condition, func, ...)				\
+	({								\
+		static bool __section(".data.once") __already_done;	\
+		bool __ret_do_once = !!(condition);			\
+									\
+		if (unlikely(__ret_do_once && !__already_done)) {	\
+			__already_done = true;				\
+			func(__VA_ARGS__);				\
+		}							\
+		unlikely(__ret_do_once);				\
+	})
+
+#endif /* _LINUX_ONCE_LITE_H */