Make isa_dma functions MPSAFE by introducing its own private lock. These

functions are selfcontained (ie. they touch only isa_dma.c static variables
and hardware) so a private lock is sufficient to prevent races. This changes
only i386/amd64 while there are also isa_dma functions for ia64/sparc64.
Sparc64 are ones empty stubs and ia64 ones are unused as ia64 does not
have isa (says marcel).

This patch removes explicit locking of Giant from a few drivers (there
are some that requires this but lack ones - this patch fixes this) and
also removes the need for implicit locking of Giant from attach routines
where it's provided by newbus.

Approved by:	ed (mentor, implicit)
Reviewed by:	jhb, attilio (glanced by)
Tested by:	Giovanni Trematerra <giovanni.trematerra gmail com>
IA64 clue:	marcel

0 files changed, 0 insertions, 0 deletions