I think by chance I discovered a trivial error

cc  -O2 -Werror -Wall -Wmissing-prototypes -Wstrict-prototypes
-Wpointer-arith
-Wno-uninitialized -Wno-main -mno-pic -I. -I../../../../arch
-I../../../.. -nost
dinc -DNMBCLUSTERS="0x100" -DMAXDSIZ="(64*1024*1024)" -DLKM -DMAXUSERS=16
-D_KER
NEL  -D_VAX_INLINE_  -c ../../../../arch/vax/vsa/smg.c
../../../../arch/vax/vsa/smg.c: In function `smg_show_screen':
../../../../arch/vax/vsa/smg.c:444: syntax error before `)'
../../../../arch/vax/vsa/smg.c:446: argument `cb' doesn't match prototype
../../../../arch/vax/vsa/smg.c:122: prototype declaration
*** Error code 1

it is fixed going at line 444 and removing the last )  before ;

Someone might want to correct it.
thanks

Rick