On Fri, Jun 10, 2011 at 11:54:16AM -0700, David Rientjes wrote:

On Fri, 10 Jun 2011, Russell King - ARM Linux wrote:

quoted

quoted

Should one submit a patch adding a warning to GFP_DMA allocations
w/o ZONE_DMA, or the idea of the original patch is wrong?

Linus was far from impressed by the original commit, saying:
| Using GFP_DMA is reasonable in a driver - on platforms where that
| matters, it should allocate from the DMA zone, on platforms where it
| doesn't matter it should be a no-op.

So no, not even a warning.

Any words of wisdom for users with CONFIG_ZONE_DMA=n that actually use 
drivers where they need GFP_DMA?  The page allocator should just silently 
return memory from anywhere?

See Linus' reply.  I quote again "on platforms where it doesn't matter it
should be a no-op".  If _you_ have a problem with that _you_ need to
discuss it with _Linus_, not me.  I'm not going to be a middle-man sitting
between two people with different opinions.

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