Changed the last argument of _kern_mount() to be a string rather than a void pointer. Greatly reduced the stack usage of _user_mount(); it now uses KPath instead of on stack paths. It now also copies the parameter argument on the heap. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9692 a95241bf-73f2-0310-859d-f6bbb57e9c96