reiserfs: use generic xattr handlers

Christoph Hellwig had asked me quite some time ago to port the reiserfs
xattrs to the generic xattr interface.

This patch replaces the reiserfs-specific xattr handling code with the
generic struct xattr_handler.

However, since reiserfs doesn't split the prefix and name when accessing
xattrs, it can't leverage generic_{set,get,list,remove}xattr without
needlessly reconstructing the name on the back end.

Update 7/26/07: Added missing dput() to deletion path.
Update 8/30/07: Added missing mark_inode_dirty when i_mode is used to
                represent an ACL and no previous ACL existed.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/reiserfs_acl.h b/include/linux/reiserfs_acl.h
index fe00f78..d180446 100644
--- a/include/linux/reiserfs_acl.h
+++ b/include/linux/reiserfs_acl.h
@@ -52,10 +52,8 @@
 int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
 				 struct inode *inode);
 int reiserfs_cache_default_acl(struct inode *dir);
-extern int reiserfs_xattr_posix_acl_init(void) __init;
-extern int reiserfs_xattr_posix_acl_exit(void);
-extern struct reiserfs_xattr_handler posix_acl_default_handler;
-extern struct reiserfs_xattr_handler posix_acl_access_handler;
+extern struct xattr_handler reiserfs_posix_acl_default_handler;
+extern struct xattr_handler reiserfs_posix_acl_access_handler;
 
 static inline void reiserfs_init_acl_access(struct inode *inode)
 {
@@ -75,16 +73,6 @@
 	return NULL;
 }
 
-static inline int reiserfs_xattr_posix_acl_init(void)
-{
-	return 0;
-}
-
-static inline int reiserfs_xattr_posix_acl_exit(void)
-{
-	return 0;
-}
-
 static inline int reiserfs_acl_chmod(struct inode *inode)
 {
 	return 0;