[PATCH 1/8] driver core: add a min_align_mask field to struct device_dma_parameters

[Greg KH]

On Thu, Feb 04, 2021 at 08:30:28PM +0100, Christoph Hellwig wrote:
> From: Jianxiong Gao <jxgao at google.com>
> 
> Some devices rely on the address offset in a page to function
> correctly (NVMe driver as an example). These devices may use
> a different page size than the Linux kernel. The address offset
> has to be preserved upon mapping, and in order to do so, we
> need to record the page_offset_mask first.
> 
> Signed-off-by: Jianxiong Gao <jxgao at google.com>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  include/linux/device.h      |  1 +
>  include/linux/dma-mapping.h | 16 ++++++++++++++++
>  2 files changed, 17 insertions(+)

Acked-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>