v4.19.13 snapshot.
diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h
new file mode 100644
index 0000000..fb767e2
--- /dev/null
+++ b/fs/pstore/internal.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PSTORE_INTERNAL_H__
+#define __PSTORE_INTERNAL_H__
+
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/pstore.h>
+
+#define PSTORE_DEFAULT_KMSG_BYTES 10240
+extern unsigned long kmsg_bytes;
+
+#ifdef CONFIG_PSTORE_FTRACE
+extern void pstore_register_ftrace(void);
+extern void pstore_unregister_ftrace(void);
+#else
+static inline void pstore_register_ftrace(void) {}
+static inline void pstore_unregister_ftrace(void) {}
+#endif
+
+#ifdef CONFIG_PSTORE_PMSG
+extern void pstore_register_pmsg(void);
+extern void pstore_unregister_pmsg(void);
+#else
+static inline void pstore_register_pmsg(void) {}
+static inline void pstore_unregister_pmsg(void) {}
+#endif
+
+extern struct pstore_info *psinfo;
+
+extern void pstore_set_kmsg_bytes(int);
+extern void pstore_get_records(int);
+extern void pstore_get_backend_records(struct pstore_info *psi,
+ struct dentry *root, int quiet);
+extern int pstore_mkfile(struct dentry *root,
+ struct pstore_record *record);
+extern bool pstore_is_mounted(void);
+extern void pstore_record_init(struct pstore_record *record,
+ struct pstore_info *psi);
+
+/* Called during module_init() */
+extern void __init pstore_choose_compression(void);
+
+#endif