Arjan van de Ven wrote:
...but Marcelo's patch doesn't implement anything of that kind.... In addition, many ISA bus drivers do not use the DMA API *at all* currently. If you want to fix them all up, great! But somehow I doubt those will get fixed in the next decade.. they've been like this for at least half a decade or longer :-)
Point being, if this doesn't already work it's likely a bug even without this patch. And drivers that don't use the DMA API should at least be allocating memory with GFP_DMA which should fail if that zone doesn't contain any memory (and if not, that's likely a bug as well).
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