TAKE - Sync kdb v2.0-2.4.17 common code with xfs

[Keith Owens <kaos@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Date:  Thu Jan  3 19:48:48 PST 2002
Workarea:  sherman.melbourne.sgi.com:/build/kaos/2.4.x-xfs

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:109105a
linux/kernel/sysctl.c - 1.47
linux/init/main.c - 1.66
linux/include/linux/sysctl.h - 1.44
linux/drivers/char/serial.c - 1.52
linux/drivers/char/keyboard.c - 1.23
linux/include/linux/kdbprivate.h - 1.16
linux/include/linux/kdb.h - 1.19
linux/kdb/ChangeLog - 1.14