[PATCH v2 1/3] powerpc/mm: Export flush_all_mm()

[Benjamin Herrenschmidt]

On Wed, 2017-08-30 at 23:17 +1000, Michael Ellerman wrote:
> It's not clear why it makes sense for these to be empty. Either for the
> general idea of the "flush_all_mm()" API, or for your intended use by
> CXL.

Indeed. On hash we don't have a way to flush a PID out of the TLB,
but you can flush the whole LPID.

Cheers,
Ben.