ppc(4) locking of isa_dma*
Roman Divacky
rdivacky at freebsd.org
Wed Jul 15 10:51:18 UTC 2009
hi
the isa_dma* functions seem to require Giant. ppc(4) uses those
but does not seem to lock Giant or anything. is this ok?
is it a bug?
I looked at the i386/isa/isa_dma.c and it seems pretty selfcontained
(ie. it operates on hw and it's own variables). would it be sufficient
to just introduce a new lock and lock with it all the isa_dma* functions
? or is there some indirect dependency on Giant that I cant see?
there are not many users of this (most prominently fdc/ppc/sound-isa and
some minor stuff).
can someone comment? thnx!
roman
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