cvs commit: src/sys/dev/ieee488 upd7210.c src/sys/dev/led led.c src/sys/dev/md md.c src/sys/geom geom_dev.c src/sys/kern kern_conf.c src/sys/sys conf.h

[Ed Schouten]

ed          2008-05-29 12:50:46 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/ieee488      upd7210.c 
    sys/dev/led          led.c 
    sys/dev/md           md.c 
    sys/geom             geom_dev.c 
    sys/kern             kern_conf.c 
    sys/sys              conf.h 
  Log:
  Remove the distinction between device minor and unit numbers.
  
  Even though we got rid of device major numbers some time ago, device
  drivers still need to provide unique device minor numbers to make_dev().
  These numbers are only used inside the kernel. They are not related to
  device major and minor numbers which are visible in devfs. These are
  actually based on the inode number of the device.
  
  It would eventually be nice to remove minor numbers entirely, but we
  don't want to be too agressive here.
  
  Because the 8-15 bits of the device number field (si_drv0) are still
  reserved for the major number, there is no 1:1 mapping of the device
  minor and unit numbers. Because this is now unused, remove the
  restrictions on these numbers.
  
  The MAXMAJOR definition was actually used for two purposes. It was used
  to convert both the userspace and kernelspace device numbers to their
  major/minor pair, which is why it is now named UMINORMASK.
  
  minor2unit() and unit2minor() have now become useless. Both minor() and
  dev2unit() now serve the same purpose. We should eventually remove some
  of them, at least turning them into macro's. If devfs would become
  completely minor number unaware, we could consider using si_drv0 directly,
  just like si_drv1 and si_drv2.
  
  Approved by:    philip (mentor)
  
  Revision  Changes    Path
  1.11      +1 -1      src/sys/dev/ieee488/upd7210.c
  1.18      +2 -1      src/sys/dev/led/led.c
  1.175     +2 -1      src/sys/dev/md/md.c
  1.97      +1 -1      src/sys/geom/geom_dev.c
  1.215     +8 -11     src/sys/kern/kern_conf.c
  1.239     +0 -2      src/sys/sys/conf.h