+++ b/lib/vsprintf.c

@@ -27,6 +27,7 @@
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/kernel.h>
+#include <linux/dcache.h>
 #include <linux/kallsyms.h>
 #include <linux/math64.h>
 #include <linux/uaccess.h>

@@ -923,10 +924,17 @@ static noinline_for_stack
 char *file_dentry_name(char *buf, char *end, const struct file *f,
 			struct printf_spec spec, const char *fmt)
 {
+	const struct path *path = &f->f_path;
+	char *p;
+	char tmp[128];