lkml.org 
[lkml]   [2021]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v4 15/66] mm: Convert vma_lookup() to use the Maple Tree
    Date
    From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

    Unlike the rbtree, the Maple Tree will return a NULL if there's
    nothing at a particular address.

    Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
    Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
    ---
    include/linux/mm.h | 7 +------
    1 file changed, 1 insertion(+), 6 deletions(-)

    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index 4d5ab70b1f6d..c28bd97a4ecd 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -2845,12 +2845,7 @@ struct vm_area_struct *find_vma_intersection(struct mm_struct *mm,
    static inline
    struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
    {
    - struct vm_area_struct *vma = find_vma(mm, addr);
    -
    - if (vma && addr < vma->vm_start)
    - vma = NULL;
    -
    - return vma;
    + return mtree_load(&mm->mm_mt, addr);
    }

    static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
    --
    2.30.2
    \
     
     \ /
      Last update: 2021-12-01 15:34    [W:3.772 / U:0.508 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site