Re: [PATCH] [STABLE-4.4, 3.18]: fix xen_swiotlb_dma_mmap prototype

[Greg KH]

On Wed, Oct 04, 2017 at 10:01:26AM -0700, Stefano Stabellini wrote:
> On Wed, 4 Oct 2017, Arnd Bergmann wrote:
> > xen_swiotlb_dma_mmap was backported from v4.10, but older
> > kernels before commit 00085f1efa38 ("dma-mapping: use unsigned long
> > for dma_attrs") use a different signature:
> > 
> > arm/xen/mm.c:202:10: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> >   .mmap = xen_swiotlb_dma_mmap,
> >           ^~~~~~~~~~~~~~~~~~~~
> > arm/xen/mm.c:202:10: note: (near initialization for 'xen_swiotlb_dma_ops.mmap')
> > 
> > This adapts the patch to the old calling conventions.
> > 
> > Fixes: 2f0b82b1b830 ("swiotlb-xen: implement xen_swiotlb_dma_mmap callback")
> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> 
> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

Thanks, I've added this tag to the patch.

greg k-h