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    SubjectRe: IrDA driver fails on PXA255
    On Mon, May 30, 2011 at 1:17 AM, David Rientjes <> wrote:
    > On Sun, 29 May 2011, Dmitry Eremin-Solenikov wrote:
    >> What about changing your patch for less intrusive one (to emit a
    >> WARN_ON) for at least one
    >> or two major releases and only then changing it back to the current state?
    > That would return memory that is not guaranteed to be within the first
    > 16MB of address space, so a GFP_DMA allocation would succeed with memory
    > not from ZONE_DMA.  That's an invalid configuration, so users, including
    > you, should at least edit their .config by hand to enable CONFIG_ZONE_DMA
    > as a workaround.  Then, we should try to fix up the Kconfig entries for
    > drivers requiring DMA allocations to select CONFIG_ZONE_DMA or fix
    > defconfigs when DMA is known to be needed for a device.

    Am I right that this was the previous behaviour for GFP_DMA allocations
    w/o CONFIG_ZONE_DMA? If so, we can have it (probably) for one more
    major release to get all warnings.

    With best wishes
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      Last update: 2011-05-29 23:35    [W:0.025 / U:0.184 seconds]
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