Ed Schouten <e...@80386.nl> writes: > > Dag-Erling Smørgrav <d...@des.no> writes: > > identified an individual device handled by that driver. FreeBSD no > > longer makes that distinction; each device has a unique system-wide > > minor number, and the major number is always zero. However, the > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > As pointed out earlier, this is not true. Major numbers can be non-zero. > > | #define major(x) ((int)(((u_int)(x) >> 8)&0xff)) > > Devices 256-511 will have a major number of 1, etc.
So: Each device has a unique system-wide device number; the minor number contains the eight least-significant bits, and the major number contains the rest. (device numbers are currently unsigned int; is there a reason not to make them explicitly 32 bits wide, i.e. uint32_t?) > Apart from that, I think there is also a fair amount of overlap with the > COMPATIBILITY section of the same manpage. Yeah, but who reads those? :) DES -- Dag-Erling Smørgrav - d...@des.no _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
