Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/pseudo_fs.h b/include/linux/pseudo_fs.h
new file mode 100644
index 0000000..eceda1d
--- /dev/null
+++ b/include/linux/pseudo_fs.h
@@ -0,0 +1,16 @@
+#ifndef __LINUX_PSEUDO_FS__
+#define __LINUX_PSEUDO_FS__
+
+#include <linux/fs_context.h>
+
+struct pseudo_fs_context {
+	const struct super_operations *ops;
+	const struct xattr_handler **xattr;
+	const struct dentry_operations *dops;
+	unsigned long magic;
+};
+
+struct pseudo_fs_context *init_pseudo(struct fs_context *fc,
+				      unsigned long magic);
+
+#endif