xattr_handler: pass dentry and inode as separate arguments of ->get()

... and do not assume they are already attached to each other

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
index caad583..f7c3973 100644
--- a/fs/reiserfs/xattr_user.c
+++ b/fs/reiserfs/xattr_user.c
@@ -7,13 +7,12 @@
 #include <linux/uaccess.h>
 
 static int
-user_get(const struct xattr_handler *handler, struct dentry *dentry,
-	 const char *name, void *buffer, size_t size)
+user_get(const struct xattr_handler *handler, struct dentry *unused,
+	 struct inode *inode, const char *name, void *buffer, size_t size)
 {
-	if (!reiserfs_xattrs_user(dentry->d_sb))
+	if (!reiserfs_xattrs_user(inode->i_sb))
 		return -EOPNOTSUPP;
-	return reiserfs_xattr_get(d_inode(dentry),
-				  xattr_full_name(handler, name),
+	return reiserfs_xattr_get(inode, xattr_full_name(handler, name),
 				  buffer, size);
 }