On Wed, Apr 08, 2020 at 01:59:00PM +0200, Christoph Hellwig wrote:

vm_map_ram can keep mappings around after the vm_unmap_ram. Using that with non-PAGE_KERNEL mappings can lead to all kinds of aliasing issues.

Signed-off-by: Christoph Hellwig hch@lst.de

Acked-by: Greg Kroah-Hartman gregkh@linuxfoundation.org