# Re: \[PATCH v19 1/8\] mmap: make mlock\_future\_check() global

- From: David Hildenbrand \<hidden\>
- Date: 2021-05-14 08:28:02 
- List: linux-arch
- Page: https://ratatoskr.run/linux-arch/2021/05/205989
- Thread: https://ratatoskr.run/linux-api/2021/05/205953/t.md

```text
On 13.05.21 20:47, Mike Rapoport wrote:
> From: Mike Rapoport <redacted>
>
> It will be used by the upcoming secret memory implementation.
>
> Signed-off-by: Mike Rapoport <redacted>
> Cc: Alexander Viro <viro@zeniv.linux.org.uk>
> Cc: Andy Lutomirski <luto@kernel.org>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Christopher Lameter <redacted>
> Cc: Dan Williams <redacted>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: David Hildenbrand <redacted>
> Cc: Elena Reshetova <elena.reshetova@intel.com>
> Cc: Hagen Paul Pfeifer <redacted>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: James Bottomley <redacted>
> Cc: "Kirill A. Shutemov" <redacted>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Michael Kerrisk <redacted>
> Cc: Palmer Dabbelt <palmer@dabbelt.com>
> Cc: Palmer Dabbelt <redacted>
> Cc: Paul Walmsley <redacted>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
> Cc: Roman Gushchin <redacted>
> Cc: Shakeel Butt <redacted>
> Cc: Shuah Khan <shuah@kernel.org>
> Cc: Thomas Gleixner <redacted>
> Cc: Tycho Andersen <redacted>
> Cc: Will Deacon <will@kernel.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 <redacted>

-- 
Thanks,

David / dhildenb

```