lkml.org 
[lkml]   [2015]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] sound: depend on ZONE_DMA
On Mon, 16 Nov 2015 09:58:28 +0100,
Boaz Harrosh wrote:
>
> On 11/16/2015 09:40 AM, Takashi Iwai wrote:
> > On Sun, 15 Nov 2015 11:53:11 +0100,
> > Boaz Harrosh wrote:
> >>
> >> On 11/12/2015 10:38 PM, Takashi Iwai wrote:
> >>> On Thu, 12 Nov 2015 21:13:57 +0100,
> >>> Dan Williams wrote:
> >>>>
> >>>> There are several sound drivers that 'select ZONE_DMA'. This is
> >>>> backwards as ZONE_DMA is an architecture capability exported to drivers.
> >>>> Switch the polarity of the dependency to disable these drivers when the
> >>>> architecture does not support ZONE_DMA. This was discovered in the
> >>>> context of testing/enabling devm_memremap_pages() which depends on
> >>>> ZONE_DEVICE. ZONE_DEVICE in turn depends on !ZONE_DMA.
> >>>
> >>> Makes sense. I applied it now, thanks.
> >>>
> >>
> >> Please add:
> >> CC: Stable Tree <stable@vger.kernel.org>
> >
> > Sorry, too late, already merged.
> >
> >
> > Takashi
> >
>
> Hi Greg
>
> Please include the mainline patch:
> [2db1a57] ALSA: pci: depend on ZONE_DMA (by Dan Williams)
>
> To the stable tree for v4.3.X Kernel.
>
> This patch is needed for proper operation of the 4.3 pmem.ko driver. Long
> story, but without this patch the persistent-memory will not be able to
> work with the new 4.3 support of page-struct which is needed if we want to
> RDMA and/or IO directly to persistent memory.
> [Is to do with the new ZONE_DEVICE and too many ZONE(s) if ZONE_DMA is enabled]

Well, it's not exactly true: you just need to deselect some drivers to
allow CONFIG_ZONE_DMA to be disabled. It's merely another side of
coin.

I don't mind including this to 4.3, though, but just want to correct
the statement.


Takashi


\
 
 \ /
  Last update: 2015-11-16 11:01    [W:0.052 / U:0.216 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site