linux-kernel - Re: [PATCH 1/3] fb-defio: If FBINFO_VIRTFB is defined, do not set VM

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Date:	Fri, 4 Dec 2009 16:42:58 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	jayakumar.lkml@...il.com, damm@...nsource.se,
	linux-kernel@...r.kernel.org, armbru@...hat.com, jeremy@...p.org
Subject: Re: [PATCH 1/3] fb-defio: If FBINFO_VIRTFB is defined, do not set 
	VM_IO flag.

On Fri, Dec 4, 2009 at 12:31 AM, Konrad Rzeszutek Wilk
<konrad.wilk@...cle.com> wrote:
> Most users (except sh_mobile_lcdcfb.c) get their framebuffer from
> vmalloc. Setting VM_IO is not necessary as the memory obtained
> from vmalloc is System RAM type and is not susceptible to PCI memory
> constraints.
> ---
>  drivers/video/fb_defio.c |    4 +++-
>  include/linux/fb.h       |    1 +
>  2 files changed, 4 insertions(+), 1 deletions(-)

I just tested this on a Migo-R board which is using sh_mobile_lcdcfb.c
in deferred io mode. No problem.

Tested-by: Magnus Damm <damm@...nsource.se>

/ magnus
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