Re: [PATCH v11 3/7] iio: core: Add new DMABUF interface infrastructure

[Paul Cercueil]

Le mercredi 19 juin 2024 à 13:43 +0200, Markus Elfring a écrit :
> …
> > +++ b/drivers/iio/industrialio-buffer.c
> …
> > +static void iio_buffer_dmabuf_release(struct kref *ref)
> > +{
> …
> > +	dma_resv_lock(dmabuf->resv, NULL);
> > +	dma_buf_unmap_attachment(attach, priv->sgt, priv->dir);
> > +	dma_resv_unlock(dmabuf->resv);
> …
> 
> Under which circumstances will another lock guard become applicable?
> https://elixir.bootlin.com/linux/v6.10-rc4/source/include/linux/cleanup.h#L179

As soon as "struct dma_resv" gets a DEFINE_GUARD().

-Paul