v4.19.13 snapshot.
diff --git a/include/linux/extable.h b/include/linux/extable.h
new file mode 100644
index 0000000..41c5b3a
--- /dev/null
+++ b/include/linux/extable.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_EXTABLE_H
+#define _LINUX_EXTABLE_H
+
+#include <linux/stddef.h> /* for NULL */
+#include <linux/types.h>
+
+struct module;
+struct exception_table_entry;
+
+const struct exception_table_entry *
+search_extable(const struct exception_table_entry *base,
+ const size_t num,
+ unsigned long value);
+void sort_extable(struct exception_table_entry *start,
+ struct exception_table_entry *finish);
+void sort_main_extable(void);
+void trim_init_extable(struct module *m);
+
+/* Given an address, look for it in the exception tables */
+const struct exception_table_entry *search_exception_tables(unsigned long add);
+
+#ifdef CONFIG_MODULES
+/* For extable.c to search modules' exception tables. */
+const struct exception_table_entry *search_module_extables(unsigned long addr);
+#else
+static inline const struct exception_table_entry *
+search_module_extables(unsigned long addr)
+{
+ return NULL;
+}
+#endif /*CONFIG_MODULES*/
+
+#endif /* _LINUX_EXTABLE_H */