Messages in this thread | | | Date | Tue, 21 Aug 2012 13:34:51 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCHv6 2/2] ARM: dma-mapping: remove custom consistent dma region |
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On Tue, Aug 21, 2012 at 02:22:35PM +0300, Hiroshi Doyu wrote: > The following "__get_vm_area_node()" can take gfp_mask, it means that > this function is expected to be called from atomic context, but why > it's _NOT_ allowed _ONLY_ from interrupt context?
One reason is it takes read/write locks without using the IRQ safe versions for starters (vmap_area_lock and vmlist_lock). I don't see any other reasons in that bit of code though.
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