Messages in this thread | | | Subject | Re: [BK-2.5] Update the generic DMA API to take GFP_ flags on | Date | Tue, 14 Jan 2003 10:30:15 -0500 | From | James Bottomley <> |
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> What about platforms that can only use GFP_ATOMIC due to > implementation side issues? Is that "OK"?
Yes.
A GFP_KERNEL request is safely implemented as GFP_ATOMIC as long as the caller checks return for NULL. for dma_alloc_coherent return checking is a requirement because the system may return NULL anyway if it is out of mappings even with a GFP_KERNEL flag.
James
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