drv_getparm() Argument Changes

int drv_getparm(unsigned int parm, void *value_p);

In previous releases, value_p was defined as type unsigned long.

In the 64-bit kernel, drv_getparm(9F) can be used to fetch both 32-bit and 64-bit quantities, yet the interface does not define the data types of these quantities, which encourages simple programming errors.

The following new routines offer a safer alternative:

clock_t           ddi_get_lbolt(void);
time_t            ddi_get_time(void);
cred_t            *ddi_get_cred(void);
pid_t             ddi_get_pid(void);

Driver writers are strongly urged to use these routines instead of drv_getparm(9F).