Re: [PATCH V3 3/9] dax/fsdev: clear vmemmap_shift when binding static pgmap

[Alison Schofield]

On Sat, May 30, 2026 at 04:50:50PM +0000, John Groves wrote:
> From: John Groves <John@xxxxxxxxxx>
> 
> Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static
> device from device_dax (which may set vmemmap_shift based on alignment) to
> fsdev_dax, the stale vmemmap_shift persists on the shared pgmap. Explicitly
> zero it before devm_memremap_pages() so the vmemmap is built for order-0
> folios as fsdev requires.
> 
> Fixes: d5406bd458b0a ("dax: add fsdev.c driver for fs-dax on character dax")
> Signed-off-by: John Groves <john@xxxxxxxxxx>
> ---

Reviewed-by: Alison Schofield <alison.schofield@xxxxxxxxx>