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dma-contiguous: fix comment for dma_release_from_contiguous

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Commit 90ae409f9e ("dma-direct: fix zone selection
after an unaddressable CMA allocation") changed the logic in
dma_release_from_contiguous to remove the normal pages fallback path,
but did not update the comment. Fix that.

Signed-off-by: Peter Collingbourne <pcc@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Peter Collingbourne 2020-04-23 09:31:31 -07:00 committed by Christoph Hellwig
parent 1d659236fb
commit 298f3db6ee
1 changed files with 2 additions and 2 deletions
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kernel/dma/contiguous.c
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@ -222,8 +222,8 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages,
* @gfp: Allocation flags. * @gfp: Allocation flags.
* *
* This function allocates contiguous memory buffer for specified device. It * This function allocates contiguous memory buffer for specified device. It
* first tries to use device specific contiguous memory area if available or * tries to use device specific contiguous memory area if available, or the
* the default global one, then tries a fallback allocation of normal pages. * default global one.
* *
* Note that it byapss one-page size of allocations from the global area as * Note that it byapss one-page size of allocations from the global area as
* the addresses within one page are always contiguous, so there is no need * the addresses within one page are always contiguous, so there is no need