NTFS: Document extended attribute ($EA) NEED_EA flag. (Based on libntfs

patch by Yura Pakhuchiy.)

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

fs/ntfs/ChangeLog

@@ -78,6 +78,8 @@ ToDo/Notes:
 	- $EA attributes can be both resident and non-resident.
 	- Use %z for size_t to fix compilation warnings.  (Andrew Morton)
 	- Fix compilation warnings with gcc-4.0.2 on SUSE 10.0.
+	- Document extended attribute ($EA) NEED_EA flag.  (Based on libntfs
+	  patch by Yura Pakhuchiy.)
 
 2.1.24 - Lots of bug fixes and support more clean journal states.
 

fs/ntfs/layout.h

@@ -2374,7 +2374,9 @@ typedef struct {
  * Extended attribute flags (8-bit).
  */
 enum {
-	NEED_EA	= 0x80
+	NEED_EA	= 0x80		/* If set the file to which the EA belongs
+				   cannot be interpreted without understanding
+				   the associates extended attributes. */
 } __attribute__ ((__packed__));
 
 typedef u8 EA_FLAGS;