Andrew Morton wrote:
On Mon, 24 Aug 2009 15:54:17 +0000 David Vrabel <david.vrabel@xxxxxxx> wrote:+ if (std->len + dma_len > QTD_MAX_XFER_SIZE) { + dma_len = QTD_MAX_XFER_SIZE - std->len; + ep = ((dma_addr + dma_len) / qset->max_packet) * qset->max_packet; + dma_len = ep - dma_addr; + }Generates a call to __udivdi3 on i386, which doesn't exist.
This only happens if CONFIG_HIGHMEM_64G is enabled which isn't a very interesting configuration so fixing this is low priority.
I do have a patch but it needs more testing.
I'm reluctant to convert it to do_div() because I can't conceive of any situation in which it makes sense to perform division on a physical bus address :(
I don't understand this comment. Can you think of a way to implement this in another way?
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