[v2, 01/10] powerpc/mm/slice: Simplify and optimise slice context initialisation

[Michael Ellerman]

On Wed, 2018-03-07 at 01:37:09 UTC, Nicholas Piggin wrote:
> The slice state of an mm gets zeroed then initialised upon exec.
> This is the only caller of slice_set_user_psize now, so that can be
> removed and instead implement a faster and simplified approach that
> requires no locking or checking existing state.
> 
> This speeds up vfork+exec+exit performance on POWER8 by 3%.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Patches 1-9 applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/1753dd1830367709144f68f539554d

cheers