diff --git a/fs/fs.c b/fs/fs.c
index 04331fc..f840516 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -67,6 +67,25 @@
 
 EXPORT_SYMBOL(read_file);
 
+int write_file(const char *filename, void *buf, size_t size)
+{
+	int fd, ret;
+
+	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT);
+	if (fd < 0)
+		return fd;
+
+	ret = write_full(fd, buf, size);
+
+	close(fd);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL(write_file);
+
 char *mkmodestr(unsigned long mode, char *str)
 {
 	static const char *l = "xwr";
diff --git a/include/fs.h b/include/fs.h
index 8ff7300..919daab 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -167,6 +167,11 @@
 void *read_file(const char *filename, size_t *size);
 
 /*
+ * Write a buffer to a file. This file is newly created.
+ */
+int write_file(const char *filename, void *buf, size_t size);
+
+/*
  * This function turns 'path' into an absolute path and removes all occurrences
  * of "..", "." and double slashes. The returned string must be freed wit free().
  */