1 files changed, 7 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 134b32068246..555bc195c420 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -27,6 +27,10 @@
 #define BLOCK_SIZE_BITS 10
 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
 
+#define SEEK_SET        0       /* seek relative to beginning of file */
+#define SEEK_CUR        1       /* seek relative to current file position */
+#define SEEK_END        2       /* seek relative to end of file */
+
 /* And dynamically-tunable limits and defaults: */
 struct files_stat_struct {
         int nr_files;           /* read only */
@@ -566,13 +570,14 @@ struct inode {
  * 3: quota file
  *
  * The locking order between these classes is
- * parent -> child -> normal -> quota
+ * parent -> child -> normal -> xattr -> quota
  */
 enum inode_i_mutex_lock_class
 {
         I_MUTEX_NORMAL,
         I_MUTEX_PARENT,
         I_MUTEX_CHILD,
+        I_MUTEX_XATTR,
         I_MUTEX_QUOTA
 };
 
@@ -716,6 +721,7 @@ extern spinlock_t files_lock;
 #define FL_POSIX        1
 #define FL_FLOCK        2
 #define FL_ACCESS       8       /* not trying to lock, just looking */
+#define FL_EXISTS       16      /* when unlocking, test for existence */
 #define FL_LEASE        32      /* lease held on this file */
 #define FL_CLOSE        64      /* unlock on close */
 #define FL_SLEEP        128     /* A blocking lock */