From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>,
linux-mm@kvack.org, linux-media@vger.kernel.org,
Hans Verkuil <hverkuil@xs4all.nl>,
dri-devel@lists.freedesktop.org, Pawel Osciak <pawel@osciak.com>,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
mgorman@suse.de, Marek Szyprowski <m.szyprowski@samsung.com>,
linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH 2/9] mm: Provide new get_vaddr_frames() helper
Date: Tue, 2 Jun 2015 17:23:00 +0200 [thread overview]
Message-ID: <20150602152300.GD17315@quack.suse.cz> (raw)
In-Reply-To: <20150528162402.19a0a26a5b9eae36aa8050e5@linux-foundation.org>
[-- Attachment #1: Type: text/plain, Size: 1227 bytes --]
On Thu 28-05-15 16:24:02, Andrew Morton wrote:
> On Wed, 13 May 2015 15:08:08 +0200 Jan Kara <jack@suse.cz> wrote:
>
> > Provide new function get_vaddr_frames(). This function maps virtual
> > addresses from given start and fills given array with page frame numbers of
> > the corresponding pages. If given start belongs to a normal vma, the function
> > grabs reference to each of the pages to pin them in memory. If start
> > belongs to VM_IO | VM_PFNMAP vma, we don't touch page structures. Caller
> > must make sure pfns aren't reused for anything else while he is using
> > them.
> >
> > This function is created for various drivers to simplify handling of
> > their buffers.
> >
> > Acked-by: Mel Gorman <mgorman@suse.de>
> > Acked-by: Vlastimil Babka <vbabka@suse.cz>
> > Signed-off-by: Jan Kara <jack@suse.cz>
> > ---
> > include/linux/mm.h | 44 +++++++++++
> > mm/gup.c | 226 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>
> That's a lump of new code which many kernels won't be needing. Can we
> put all this in a new .c file and select it within drivers/media
> Kconfig?
So the attached patch should do what you had in mind. OK?
Honza
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR
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next prev parent reply other threads:[~2015-06-02 15:23 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-13 13:08 [PATCH 0/9 v5] Helper to abstract vma handling in media layer Jan Kara
2015-05-13 13:08 ` [PATCH 1/9] [media] vb2: Push mmap_sem down to memops Jan Kara
2015-05-13 13:08 ` [PATCH 2/9] mm: Provide new get_vaddr_frames() helper Jan Kara
2015-05-28 23:24 ` Andrew Morton
2015-06-01 12:40 ` Jan Kara
2015-06-01 13:02 ` Hans Verkuil
2015-06-02 15:23 ` Jan Kara [this message]
2015-06-02 22:29 ` Andrew Morton
2015-06-03 9:34 ` Jan Kara
2015-05-13 13:08 ` [PATCH 3/9] media: omap_vout: Convert omap_vout_uservirt_to_phys() to use get_vaddr_pfns() Jan Kara
2015-05-13 13:08 ` [PATCH 4/9] vb2: Provide helpers for mapping virtual addresses Jan Kara
2015-05-13 13:08 ` [PATCH 5/9] media: vb2: Convert vb2_dma_sg_get_userptr() to use frame vector Jan Kara
2015-05-13 13:08 ` [PATCH 6/9] media: vb2: Convert vb2_vmalloc_get_userptr() " Jan Kara
2015-05-13 13:08 ` [PATCH 7/9] media: vb2: Convert vb2_dc_get_userptr() " Jan Kara
2015-05-13 13:08 ` [PATCH 8/9] media: vb2: Remove unused functions Jan Kara
2015-05-13 13:08 ` [PATCH 9/9] drm/exynos: Convert g2d_userptr_get_dma_addr() to use get_vaddr_frames() Jan Kara
2015-05-14 10:51 ` Inki Dae
2015-05-14 11:39 ` Jan Kara
2015-06-10 9:07 ` Hans Verkuil
2015-05-25 11:37 ` [PATCH 0/9 v5] Helper to abstract vma handling in media layer Hans Verkuil
2015-05-25 13:55 ` Jan Kara
-- strict thread matches above, loose matches on Subject: below --
2015-07-13 14:55 [PATCH 0/9 v7] " Jan Kara
2015-07-13 14:55 ` [PATCH 2/9] mm: Provide new get_vaddr_frames() helper Jan Kara
2015-07-17 10:23 ` Hans Verkuil
2015-07-17 20:26 ` Andrew Morton
2015-05-06 7:28 [PATCH 0/9 v4] Helper to abstract vma handling in media layer Jan Kara
2015-05-06 7:28 ` [PATCH 2/9] mm: Provide new get_vaddr_frames() helper Jan Kara
2015-05-06 10:45 ` Vlastimil Babka
2015-05-06 14:58 ` Jan Kara
2015-05-08 14:49 ` Mel Gorman
2015-05-11 14:00 ` Jan Kara
2015-05-11 14:47 ` Mel Gorman
2015-05-05 16:01 [PATCH 0/9 v3] Helper to abstract vma handling in media layer Jan Kara
2015-05-05 16:01 ` [PATCH 2/9] mm: Provide new get_vaddr_frames() helper Jan Kara
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