lkml.org 
[lkml]   [2011]   [May]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: IrDA driver fails on PXA255
    From
    On Mon, May 30, 2011 at 1:17 AM, David Rientjes <rientjes@google.com> 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
    Dmitry
    --
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2011-05-29 23:35    [W:2.980 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site