Messages in this thread |  | | Subject | Re: [BK-2.5] Update arm implementation of DMA API to include GFP_ | Date | Tue, 14 Jan 2003 10:41:51 -0500 | From | James Bottomley <> |
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James.Bottomley@SteelEye.com said: > Is this really safe? Maybe ARM needs to use GFP_ATOMIC all the time > for a specific reason, such as where and how it maps the cpu side > mappings of the memory?
According to Russell King, yes.
The PA-RISC one should also be correct. Actually, to be honest, there's a longstanding issue in the pa-risc code where we can potentially allocate a page table using GFP_KERNEL in pci_alloc_consistent() when we obtain the mapping resources. I can argue that we never go down this path in practice, but it does make GFP_ATOMIC allocations look unsafe on the platform.
James
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