linux-kernel - Re: [PATCH v19 1/8] mmap: make mlock_future

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Date:   Fri, 14 May 2021 10:27:51 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christopher Lameter <cl@...ux.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Elena Reshetova <elena.reshetova@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Hagen Paul Pfeifer <hagen@...u.net>,
        Ingo Molnar <mingo@...hat.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        Kees Cook <keescook@...omium.org>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Mark Rutland <mark.rutland@....com>,
        Michal Hocko <mhocko@...e.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Roman Gushchin <guro@...com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tycho Andersen <tycho@...ho.ws>, Will Deacon <will@...nel.org>,
        Yury Norov <yury.norov@...il.com>, linux-api@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-riscv@...ts.infradead.org,
        x86@...nel.org
Subject: Re: [PATCH v19 1/8] mmap: make mlock_future_check() global

On 13.05.21 20:47, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@...ux.ibm.com>
> 
> It will be used by the upcoming secret memory implementation.
> 
> Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
> Cc: Alexander Viro <viro@...iv.linux.org.uk>
> Cc: Andy Lutomirski <luto@...nel.org>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Christopher Lameter <cl@...ux.com>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Elena Reshetova <elena.reshetova@...el.com>
> Cc: Hagen Paul Pfeifer <hagen@...u.net>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: James Bottomley <jejb@...ux.ibm.com>
> Cc: "Kirill A. Shutemov" <kirill@...temov.name>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Matthew Wilcox <willy@...radead.org>
> Cc: Michael Kerrisk <mtk.manpages@...il.com>
> Cc: Palmer Dabbelt <palmer@...belt.com>
> Cc: Palmer Dabbelt <palmerdabbelt@...gle.com>
> Cc: Paul Walmsley <paul.walmsley@...ive.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Rick Edgecombe <rick.p.edgecombe@...el.com>
> Cc: Roman Gushchin <guro@...com>
> Cc: Shakeel Butt <shakeelb@...gle.com>
> Cc: Shuah Khan <shuah@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Tycho Andersen <tycho@...ho.ws>
> Cc: Will Deacon <will@...nel.org>
> ---
>   mm/internal.h | 3 +++
>   mm/mmap.c     | 5 ++---
>   2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/internal.h b/mm/internal.h
> index 54bd0dc2c23c..46eb82eaa195 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -373,6 +373,9 @@ static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
>   extern void mlock_vma_page(struct page *page);
>   extern unsigned int munlock_vma_page(struct page *page);
>   
> +extern int mlock_future_check(struct mm_struct *mm, unsigned long flags,
> +			      unsigned long len);
> +
>   /*
>    * Clear the page's PageMlocked().  This can be useful in a situation where
>    * we want to unconditionally remove a page from the pagecache -- e.g.,
> diff --git a/mm/mmap.c b/mm/mmap.c
> index 0584e540246e..81f5595a8490 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -1352,9 +1352,8 @@ static inline unsigned long round_hint_to_min(unsigned long hint)
>   	return hint;
>   }
>   
> -static inline int mlock_future_check(struct mm_struct *mm,
> -				     unsigned long flags,
> -				     unsigned long len)
> +int mlock_future_check(struct mm_struct *mm, unsigned long flags,
> +		       unsigned long len)
>   {
>   	unsigned long locked, lock_limit;
>   
> 

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb