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

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Message-ID: <CABdmKX2FPg+hO55qWndMajuWP0kZH=OWEh9v-d8aO6HQWyxJtQ@mail.gmail.com>
Date: Thu, 14 Aug 2025 16:30:30 -0700
From: "T.J. Mercier" <tjmercier@...gle.com>
To: Sumit Garg <sumit.garg@...nel.org>
Cc: Jens Wiklander <jens.wiklander@...aro.org>, 
	Christian König <christian.koenig@....com>, 
	Sumit Semwal <sumit.semwal@...aro.org>, 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

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.
> >
> > 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
> >