From: Liam R. Howlett Date: Thu, 8 Apr 2021 20:15:00 +0000 (-0400) Subject: mm: Optimize find_exact_vma() to use vma_lookup() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2cb7f94d23af7aca37b7b338f6894f3ebd28db71;p=users%2Fjedix%2Flinux-maple.git mm: Optimize find_exact_vma() to use vma_lookup() Use vma_lookup() to walk the tree to the start value requested. If the vma at the start does not match, then the answer is NULL and there is no need to look at the next vma the way that find_vma() would. Signed-off-by: Liam R. Howlett Reviewed-by: Vlastimil Babka --- diff --git a/include/linux/mm.h b/include/linux/mm.h index 3c2093616421..965298bba995 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2856,7 +2856,7 @@ static inline unsigned long vma_pages(struct vm_area_struct *vma) static inline struct vm_area_struct *find_exact_vma(struct mm_struct *mm, unsigned long vm_start, unsigned long vm_end) { - struct vm_area_struct *vma = find_vma(mm, vm_start); + struct vm_area_struct *vma = vma_lookup(mm, vm_start); if (vma && (vma->vm_start != vm_start || vma->vm_end != vm_end)) vma = NULL;