Re: [PATCH 1/5] swiotlb: Introduce swiotlb_max_mapping_size()

[Christoph Hellwig <hch@xxxxxx>]

On Wed, Jan 23, 2019 at 05:30:45PM +0100, Joerg Roedel wrote:
> +extern size_t swiotlb_max_mapping_size(struct device *dev);

No need for the extern keyword on function declarations in headers.