powerpc/mm/nohash: do not flush the entire mm when range is a single page

[Michael Ellerman]

On Tue, 2018-01-23 at 13:22:50 UTC, Christophe Leroy wrote:
> Most of the time, flush_tlb_range() is called on single pages.
> At the time being, flush_tlb_range() inconditionnaly calls
> flush_tlb_mm() which flushes at least the entire PID pages and on
> older CPUs like 4xx or 8xx it flushes the entire TLB table.
> 
> This patch calls flush_tlb_page() instead of flush_tlb_mm() when
> the range is a single page.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/5c8136fa1af7c0e9b4aec89cf2832f

cheers