svn commit: r318021 - in head/sys/arm: arm include

[Andrew Turner]

> On 9 May 2017, at 12:05, Michal Meloun <mmel at FreeBSD.org> wrote:
> 
> Author: mmel
> Date: Tue May  9 11:05:32 2017
> New Revision: 318021
> URL: https://svnweb.freebsd.org/changeset/base/318021
> 
> Log:
>  Introduce pmap_remap_vm_attr(),
>  it allows to remap one VM memattr class to another.
> 
>  This function is intent to be used as workaround for various SoC bugs,
>  mainly access ordering/sequencing related bugs in crossbar fabric.

This seems quite heavy handed to change the attribute for all memory of a given type. Other architectures have pmap_change_attr to change the attribute on a specific range of memory.

Andrew