Re: [PATCH v3] ARC: mm: remove __ARCH_USE_5LEVEL_HACK

[Kirill A. Shutemov]

On Wed, Oct 09, 2019 at 06:57:31PM +0000, Vineet Gupta wrote:
> Add the intermediate p4d accessors to make it 5 level compliant.
> 
> This is a non-functional change anyways since ARC has software page walker
> with 2 lookup levels (pgd -> pte)
> 
> There is slight code bloat due to pulling in needless p*d_free_tlb()
> macros which needs to be addressed seperately.
> 
> | bloat-o-meter2 vmlinux-with-5LEVEL_HACK vmlinux-patched
> | add/remove: 0/0 grow/shrink: 2/0 up/down: 128/0 (128)
> | function                                     old     new   delta
> | free_pgd_range                               546     656    +110
> | p4d_clear_bad                                  2      20     +18
> | Total: Before=4137148, After=4137276, chg 0.000000%
> 
> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>

Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov