On 10/27/05 04:16 Scott Long said the following:
an example would be using (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_PREWRITE)
which
would be 0x03 in freebsd 4.x and 0x06 in freebsd 5.x. the gotcha is that
0x03 in freebsd 4.x is BUS_DMASYNC_POSTWRITE. so therefore,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_PREWRITE will be
BUS_DMASYNC_POSTWRITE in
4.x which in the syscall is actually a no op.
Yes, that is fugly. Just don't use the | versions for now I would guess.
Trying to maintain source compatibility between 4.x and 5.x/6.x will
make you encounter a whole lot more problems than just this.
could you elaborate on what busdma related problems there'd be, between 4.x
and 5.x/6.x ? do, for example, the inner workings of the bus_dma* syscalls
work the same on both ?
--
Regards, /\_/\ "All dogs go to heaven."
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