Symbol: CALLOUT_ID_MASK
usr/src/cmd/mdb/common/modules/genunix/genunix.c
859
#define CO_PLAIN_ID(xid) ((xid) & CALLOUT_ID_MASK)
usr/src/uts/common/os/callout.c
1303
if ((xid & CALLOUT_ID_MASK) != id)