switch xattr_handler->set() to passing dentry and inode separately

preparation for similar switch in ->setxattr() (see the next commit for
rationale).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index d111f69..2773b15 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -74,11 +74,12 @@
 }
 
 static int
-xfs_xattr_set(const struct xattr_handler *handler, struct dentry *dentry,
-		const char *name, const void *value, size_t size, int flags)
+xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
+		struct inode *inode, const char *name, const void *value,
+		size_t size, int flags)
 {
 	int			xflags = handler->flags;
-	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
+	struct xfs_inode	*ip = XFS_I(inode);
 	int			error;
 
 	/* Convert Linux syscall to XFS internal ATTR flags */
@@ -92,7 +93,7 @@
 	error = xfs_attr_set(ip, (unsigned char *)name,
 				(void *)value, size, xflags);
 	if (!error)
-		xfs_forget_acl(d_inode(dentry), name, xflags);
+		xfs_forget_acl(inode, name, xflags);
 
 	return error;
 }