Plan 9 from Bell Labs 1994-04-29
1 files changed, 4 insertions(+), 1 deletions(-) M port/alarm.c
M port/alarm.c => port/alarm.c +4 -1
@@ 84,7 84,10 @@ procalarm(ulong time) Proc **l, *f; ulong when, old; - old = TK2MS(up->alarm - MACHP(0)->ticks); + if(up->alarm) + old = TK2MS(up->alarm - MACHP(0)->ticks); + else + old = 0; if(time == 0) { up->alarm = 0; return old;