freebsd-skq/sys/pc98
dillon dc5aafeb94 Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
..
apm Remove __P. 2002-03-20 11:52:56 +00:00
cbus Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt 2002-03-27 05:39:23 +00:00
compile Don't need the .keep_me files. Obrien and I committed past each other. 2001-07-01 23:35:44 +00:00
conf Fix style. 2002-03-25 12:44:03 +00:00
i386 Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt 2002-03-27 05:39:23 +00:00
pc98 Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt 2002-03-27 05:39:23 +00:00