On Tue, 22 Oct 1996, Andrew Gillham wrote:

> Curt Sampson wrote:
> > 
> > 
> > Hmm. Isn't the CHANGES file pretty close to this?
> 
> Yup, it is, but it doesn't necessarily explain the ramifications of
> the change. [...]
> 
> [change]
> Changed the reboot(2) system call to take (int bootopt, char *
>       bootstr) to allow smarter firmwire the ability to reboot
>       with a string.  [mrg 960809]
> 
> [effect]
> Old reboot(8) binaries will not be able to reboot a new kernel, they
> will core dump (leaving a zero length corefile), and will hang your
> system.  Make sure you update reboot(8) before attempting to reboot
> a -current kernel,

Or, instead, make sure you have COMPAT_12 defined in your kernel config.

--scott