Date: Sun, 19 Mar 2000 00:46:02 -0500 (EST)
From: Donald Becker <[EMAIL PROTECTED]>
Removing the code prevents backward compatibility, and risks a similar
change in the future either breaking drivers, or perhap worse, silently
having a very bad performance impact that is difficult to trace to the
source.
The bad performance comes when a chip has to do three or more PCI
transactions instead of one to transfer data.
Data structures which are accessed by the chip should be obtained
via pci_alloc_consistent(), we have portable PCI dma memory interfaces
these days.
Later,
David S. Miller
[EMAIL PROTECTED]
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