powerpc/mm: Add a CONFIG option to choose if radix is used by default

[Michael Ellerman]

On Tue, 2017-10-24 at 15:48:49 UTC, Michael Ellerman wrote:
> Currently if the hardware supports the radix MMU we will use
> it, *unless* "disable_radix" is passed on the kernel command line.
> 
> However some users would like the reverse semantics. ie. The kernel
> uses the hash MMU by default, unless radix is explicitly requested on
> the command line.
> 
> So add a CONFIG option to choose whether we use radix by default or
> not, and expand the disable_radix command line option to allow
> "disable_radix=no" which *enables* radix.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/1fd6c02207107c8892219dacef01de

cheers