Look Ma' what I found on my harddisk ...

 o New faster syscalls for 2.1.x, too
 o Upgrade to 2.1.89.

Don't try to run this.  It's flaky as hell.  But feel free to debug ...

1 files changed, 13 insertions, 10 deletions

diff --git a/fs/attr.c b/fs/attr.c
index e4ab414a3..e916a2a3d 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -41,8 +41,8 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
 		if ((current->fsuid != inode->i_uid) && !fsuser())
 			goto error;
 		/* Also check the setgid bit! */
-		if (!fsuser() && !in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
-					     inode->i_gid))
+		if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
+				inode->i_gid) && !fsuser())
 			attr->ia_mode &= ~S_ISGID;
 	}
 
@@ -75,14 +75,15 @@ void inode_setattr(struct inode * inode, struct iattr * attr)
 		inode->i_ctime = attr->ia_ctime;
 	if (ia_valid & ATTR_MODE) {
 		inode->i_mode = attr->ia_mode;
-		if (!fsuser() && !in_group_p(inode->i_gid))
+		if (!in_group_p(inode->i_gid) && !fsuser())
 			inode->i_mode &= ~S_ISGID;
 	}
 	mark_inode_dirty(inode);
 }
 
-int notify_change(struct inode * inode, struct iattr * attr)
+int notify_change(struct dentry * dentry, struct iattr * attr)
 {
+	struct inode *inode = dentry->d_inode;
 	int error;
 	time_t now = CURRENT_TIME;
 	unsigned int ia_valid = attr->ia_valid;
@@ -93,11 +94,13 @@ int notify_change(struct inode * inode, struct iattr * attr)
 	if (!(ia_valid & ATTR_MTIME_SET))
 		attr->ia_mtime = now;
 
-	if (inode->i_sb && inode->i_sb->s_op && inode->i_sb->s_op->notify_change) 
-		return inode->i_sb->s_op->notify_change(inode, attr);
-
-	error = inode_change_ok(inode, attr);
-	if (!error)
-		inode_setattr(inode, attr);
+	if (inode->i_sb && inode->i_sb->s_op &&
+	    inode->i_sb->s_op->notify_change) 
+		error = inode->i_sb->s_op->notify_change(dentry, attr);
+	else {
+		error = inode_change_ok(inode, attr);
+		if (!error)
+			inode_setattr(inode, attr);
+	}
 	return error;
 }