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

[Jens Wiklander <jens.wiklander@linaro.org>]

Hi,

On Thu, Sep 11, 2025 at 10:00 AM Sumit Semwal <sumit.semwal@linaro.org> wrote:
>
> Hi Jens,
>
> On Thu, 11 Sept 2025 at 13:20, Jens Wiklander <jens.wiklander@linaro.org> wrote:
> >
> > Hi Sumit,
> >
> > On Thu, Sep 11, 2025 at 9:15 AM Sumit Semwal <sumit.semwal@linaro.org> wrote:
> > >
> > > Hello Jens,
> > >
> > > On Fri, 15 Aug 2025 at 05:00, T.J. Mercier <tjmercier@google.com> wrote:
> > > >
> > > > On Wed, Aug 13, 2025 at 11:13 PM Sumit Garg <sumit.garg@kernel.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"?
>
> I think "DMA_BUF_HEAP" may be better?

I'll use that.

Thanks,
Jens

> >
> > >
> > > With that change, please feel free to use my
> > > Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
> >
> > Thanks,
> > Jens
> >
> > > > > >
> > > > > > Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
> > > > > > Reviewed-by: Sumit Garg <sumit.garg@oss.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@google.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.
>
>
>
> --
> Thanks and regards,
>
> Sumit Semwal (he / him)
> Senior Tech Lead - Android, Platforms and Virtualisation
> Linaro.org │ Arm Solutions at Light Speed