commit53490b545c("staging: unisys: move periodic_work.c into the visorbus directory") has removed the visorutil directory but missed removing the reference in the Makefile. Fixes:53490b545c("staging: unisys: move periodic_work.c into the visorbus directory") Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>