Commit 42ed6452 authored by Christoph Hellwig's avatar Christoph Hellwig

dma-direct: comment the dma_direct_free calling convention

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent f25e6f6b
......@@ -84,6 +84,10 @@ void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
return page_address(page);
}
/*
* NOTE: this function must never look at the dma_addr argument, because we want
* to be able to use it as a helper for iommu implementations as well.
*/
void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_addr, unsigned long attrs)
{
......
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