ff_dev linux-2.6.18.openvz # cat make.log
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h
  CHK     include/linux/compile.h
  CC [M]  kernel/cpt/cpt_process.o
kernel/cpt/cpt_process.c: In function 'dump_one_process':
kernel/cpt/cpt_process.c:658: error: 'compat_nanosleep_restart' undeclared (first use in this function)
kernel/cpt/cpt_process.c:658: error: (Each undeclared identifier is reported only once
kernel/cpt/cpt_process.c:658: error: for each function it appears in.)
make[2]: *** [kernel/cpt/cpt_process.o] Error 1
make[1]: *** [kernel/cpt] Error 2
make: *** [kernel] Error 2

ff_dev linux-2.6.18.openvz # patch -p1 < diff-cpt-compat-fix-20070130
patching file kernel/cpt/cpt_process.c
ff_dev linux-2.6.18.openvz # make
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h
  CHK     include/linux/compile.h
  GEN     usr/initramfs_data.cpio.gz
  AS      usr/initramfs_data.o
  LD      usr/built-in.o
  CC [M]  kernel/cpt/cpt_process.o
  CC [M]  kernel/cpt/cpt_mm.o
  CC [M]  kernel/cpt/cpt_files.o
  CC [M]  kernel/cpt/cpt_kernel.o
  CC [M]  kernel/cpt/cpt_socket.o
  CC [M]  kernel/cpt/cpt_socket_in.o
  CC [M]  kernel/cpt/cpt_tty.o
  CC [M]  kernel/cpt/cpt_sysvipc.o
  CC [M]  kernel/cpt/cpt_net.o
  CC [M]  kernel/cpt/cpt_conntrack.o
  CC [M]  kernel/cpt/cpt_epoll.o
  CC [M]  kernel/cpt/cpt_ubc.o
  AS [M]  kernel/cpt/cpt_x8664.o
  CC [M]  kernel/cpt/rst_proc.o
  CC [M]  kernel/cpt/rst_undump.o
kernel/cpt/rst_undump.c: In function 'hook':
kernel/cpt/rst_undump.c:337: error: 'compat_nanosleep_restart' undeclared (first use in this function)
kernel/cpt/rst_undump.c:337: error: (Each undeclared identifier is reported only once
kernel/cpt/rst_undump.c:337: error: for each function it appears in.)
make[2]: *** [kernel/cpt/rst_undump.o] Error 1
make[1]: *** [kernel/cpt] Error 2
make: *** [kernel] Error 2

/* #ifdef CONFIG_X86_64 // - old knackered code PWI 20070130 */
#if defined(CONFIG_X86_64) && defined(CONFIG_COMPAT)
                        if (!ti->cpt_64bit)
                                current->thread_info->restart_block.fn = compat_nanosleep_restart;
#endif