--- zzzz-none-000/linux-3.10.107/fs/ext2/ext2.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/ext2/ext2.h	2021-02-04 17:41:59.000000000 +0000
@@ -380,10 +380,15 @@
 #define EXT2_MOUNT_NO_UID32		0x000200  /* Disable 32-bit UIDs */
 #define EXT2_MOUNT_XATTR_USER		0x004000  /* Extended user attributes */
 #define EXT2_MOUNT_POSIX_ACL		0x008000  /* POSIX Access Control Lists */
-#define EXT2_MOUNT_XIP			0x010000  /* Execute in place */
+#define EXT2_MOUNT_XIP			0x010000  /* Obsolete, use DAX */
 #define EXT2_MOUNT_USRQUOTA		0x020000  /* user quota */
 #define EXT2_MOUNT_GRPQUOTA		0x040000  /* group quota */
 #define EXT2_MOUNT_RESERVATION		0x080000  /* Preallocation */
+#ifdef CONFIG_FS_DAX
+#define EXT2_MOUNT_DAX			0x100000  /* Direct Access */
+#else
+#define EXT2_MOUNT_DAX			0
+#endif
 
 
 #define clear_opt(o, opt)		o &= ~EXT2_MOUNT_##opt
@@ -679,6 +684,9 @@
 	struct rw_semaphore xattr_sem;
 #endif
 	rwlock_t i_meta_lock;
+#ifdef CONFIG_FS_DAX
+	struct rw_semaphore dax_sem;
+#endif
 
 	/*
 	 * truncate_mutex is for serialising ext2_truncate() against
@@ -689,8 +697,19 @@
 	struct mutex truncate_mutex;
 	struct inode	vfs_inode;
 	struct list_head i_orphan;	/* unlinked but open inodes */
+#ifdef CONFIG_QUOTA
+	struct dquot *i_dquot[MAXQUOTAS];
+#endif
 };
 
+#ifdef CONFIG_FS_DAX
+#define dax_sem_down_write(ext2_inode)	down_write(&(ext2_inode)->dax_sem)
+#define dax_sem_up_write(ext2_inode)	up_write(&(ext2_inode)->dax_sem)
+#else
+#define dax_sem_down_write(ext2_inode)
+#define dax_sem_up_write(ext2_inode)
+#endif
+
 /*
  * Inode dynamic state flags
  */
@@ -785,11 +804,9 @@
 		      int datasync);
 extern const struct inode_operations ext2_file_inode_operations;
 extern const struct file_operations ext2_file_operations;
-extern const struct file_operations ext2_xip_file_operations;
 
 /* inode.c */
 extern const struct address_space_operations ext2_aops;
-extern const struct address_space_operations ext2_aops_xip;
 extern const struct address_space_operations ext2_nobh_aops;
 
 /* namei.c */