linux-kernel - Re: [PATCH v11 2/9] dma-buf: dma-heap: export declared functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHUa44HHSKwiBYPMSY5hj6wyWc9-uvtQVx+JLx4M5yjD5AwyTg@mail.gmail.com>
Date: Thu, 11 Sep 2025 09:50:04 +0200
From: Jens Wiklander <jens.wiklander@...aro.org>
To: Sumit Semwal <sumit.semwal@...aro.org>
Cc: "T.J. Mercier" <tjmercier@...gle.com>, Sumit Garg <sumit.garg@...nel.org>, 
	Christian König <christian.koenig@....com>, 
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, 
	op-tee@...ts.trustedfirmware.org, linux-arm-kernel@...ts.infradead.org, 
	Olivier Masse <olivier.masse@....com>, Thierry Reding <thierry.reding@...il.com>, 
	Yong Wu <yong.wu@...iatek.com>, Benjamin Gaignard <benjamin.gaignard@...labora.com>, 
	Brian Starkey <Brian.Starkey@....com>, John Stultz <jstultz@...gle.com>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, azarrabi@....qualcomm.com, 
	Simona Vetter <simona.vetter@...ll.ch>, Daniel Stone <daniel@...ishbar.org>, 
	Rouven Czerwinski <rouven.czerwinski@...aro.org>, robin.murphy@....com, 
	Sumit Garg <sumit.garg@....qualcomm.com>
Subject: Re: [PATCH v11 2/9] dma-buf: dma-heap: export declared functions

Hi Sumit,

On Thu, Sep 11, 2025 at 9:15 AM Sumit Semwal <sumit.semwal@...aro.org> wrote:
>
> Hello Jens,
>
> On Fri, 15 Aug 2025 at 05:00, T.J. Mercier <tjmercier@...gle.com> wrote:
> >
> > On Wed, Aug 13, 2025 at 11:13 PM Sumit Garg <sumit.garg@...nel.org> wrote:
> > >
> > > On Wed, Aug 13, 2025 at 08:02:51AM +0200, Jens Wiklander wrote:
> > > > Export the dma-buf heap functions to allow them to be used by the OP-TEE
> > > > driver. The OP-TEE driver wants to register and manage specific secure
> > > > DMA heaps with it.
> Thank you for the series.
>
> Could you please use EXPORT_SYMBOL_GPL_NS instead of EXPORT_SYMBOL for these?

Sure, what namespace do you want in the argument for
EXPORT_SYMBOL_GPL_NS()? "DMA_BUF"?

>
> With that change, please feel free to use my
> Acked-by: Sumit Semwal <sumit.semwal@...aro.org>

Thanks,
Jens

> > > >
> > > > Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
> > > > Reviewed-by: Sumit Garg <sumit.garg@....qualcomm.com>
> > > > ---
> > > >  drivers/dma-buf/dma-heap.c | 3 +++
> > > >  1 file changed, 3 insertions(+)
> > > >
> > >
> > > Can we get an ack from DMAbuf maintainers here? With that we should be
> > > able to queue this patch-set for linux-next targetting the 6.18 merge
> > > window.
> > >
> > > -Sumit
> >
> > Reviewed-by: T.J. Mercier <tjmercier@...gle.com>
> >
> > Sorry I haven't been able to participate much upstream lately.
> > >
> > > > diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
> > > > index 3cbe87d4a464..cdddf0e24dce 100644
> > > > --- a/drivers/dma-buf/dma-heap.c
> > > > +++ b/drivers/dma-buf/dma-heap.c
> > > > @@ -202,6 +202,7 @@ void *dma_heap_get_drvdata(struct dma_heap *heap)
> > > >  {
> > > >       return heap->priv;
> > > >  }
> > > > +EXPORT_SYMBOL(dma_heap_get_drvdata);
> > > >
> > > >  /**
> > > >   * dma_heap_get_name - get heap name
> > > > @@ -214,6 +215,7 @@ const char *dma_heap_get_name(struct dma_heap *heap)
> > > >  {
> > > >       return heap->name;
> > > >  }
> > > > +EXPORT_SYMBOL(dma_heap_get_name);
> > > >
> > > >  /**
> > > >   * dma_heap_add - adds a heap to dmabuf heaps
> > > > @@ -303,6 +305,7 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
> > > >       kfree(heap);
> > > >       return err_ret;
> > > >  }
> > > > +EXPORT_SYMBOL(dma_heap_add);
> > > >
> > > >  static char *dma_heap_devnode(const struct device *dev, umode_t *mode)
> > > >  {
> > > > --
> > > > 2.43.0
> > > >
>
> Best,
> Sumit.