diff --git a/include/linux/fs.h b/include/linux/fs.h
index f140c11d35dd6fae23cb92c64705e6bc84dfb0ef..9b00676f5d9d28fa1690c2048be381d6f1c512a2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -275,6 +275,7 @@ struct writeback_control;
 
 /*
  * Write life time hint values.
+ * Stored in struct inode as u8.
  */
 enum rw_hint {
 	WRITE_LIFE_NOT_SET	= 0,
@@ -609,8 +610,8 @@ struct inode {
 	struct timespec64	i_ctime;
 	spinlock_t		i_lock;	/* i_blocks, i_bytes, maybe i_size */
 	unsigned short          i_bytes;
-	unsigned int		i_blkbits;
-	enum rw_hint		i_write_hint;
+	u8			i_blkbits;
+	u8			i_write_hint;
 	blkcnt_t		i_blocks;
 
 #ifdef __NEED_I_SIZE_ORDERED