K 10
svn:author
V 6
brucec
K 8
svn:date
V 27
2010-12-02T22:19:30.230158Z
K 7
svn:log
V 285
Disallow passing in a count of zero bytes to the bus_space(9) functions.

Passing a count of zero on i386 and amd64 for [I386|AMD64]_BUS_SPACE_MEM
causes a crash/hang since the 'loop' instruction decrements the counter
before checking if it's zero.

PR:	kern/80980
Discussed with:	jhb

END