linux-kernel - Re: [PATCH v2 09/70] mm/mmap: Change find_vma

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Date:   Tue, 12 Jan 2021 13:03:03 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        maple-tree@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...gle.com>, Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jerome Glisse <jglisse@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v2 09/70] mm/mmap: Change find_vma_prev() to use maple
 tree

Please see kernel-doc fixes below:


On 1/12/21 8:11 AM, Liam R. Howlett wrote:
> Change the implementation of find_vma_prev to use the new maple tree
> data structure.
> 
> Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
> ---
>  mm/mmap.c | 27 +++++++++++++++++----------
>  1 file changed, 17 insertions(+), 10 deletions(-)
> 
> diff --git a/mm/mmap.c b/mm/mmap.c
> index ab1cb0efc4c65..f123f9c97dfe8 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -2500,23 +2500,30 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
>  }
>  EXPORT_SYMBOL(find_vma);
>  
> -/*
> - * Same as find_vma, but also return a pointer to the previous VMA in *pprev.
> +/**
> + * find_vma_prev() - Find the VMA for a given address, or the next vma and
> + * sets %pprev to the previous VMA, if any.

    * set @pprev

> + * @mm The mm_struct to check

    * @mm: ...

> + * @addr: The address
> + * @pprev: The pointer to set to the previous VMA
> + *
> + * Returns: The VMA associated with @addr, or the next vma.
> + * May return NULL in the case of no vma at addr or above.

                 %NULL

>   */
>  struct vm_area_struct *
>  find_vma_prev(struct mm_struct *mm, unsigned long addr,


thanks.
-- 
~Randy