Re: [PATCH] x86/memory: Drop pud_mknotpresent()

[Kirill A. Shutemov]

On Mon, Mar 23, 2020 at 06:35:42AM +0530, Anshuman Khandual wrote:
> There is an inconsistency between PMD and PUD based THP page table helpers
> like the following, as pud_present() does not test for _PAGE_PSE.
> 
> pmd_present(pmd_mknotpresent(pmd)) : True
> pud_present(pud_mknotpresent(pud)) : False
> 
> This drops pud_mknotpresent() as there are no current users. If/when needed
> back later, pud_present() will also have to fixed to accommodate _PAGE_PSE.
> 
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
> Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: linux-mm@xxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>

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

-- 
 Kirill A. Shutemov