mod_find_by_filename
if (mod_find_by_filename(NULL, "misc/klmmod") != NULL)
mctlp = mod_find_by_filename("drv", drvmod);
modp = mod_find_by_filename(NULL, name);
extern modctl_t *mod_find_by_filename(char *, char *);
modp = mod_find_by_filename("sys", syscallnames[code]);
modp = mod_find_by_filename("sys", syscallnames[code]);