From 5299008ca51d572809783fcd48c9e76fa7dc1315 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Mon, 22 Aug 2022 15:04:32 +0000 Subject: [PATCH] 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. Link: https://lkml.kernel.org/r/20220822150128.1562046-21-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Vlastimil Babka Cc: Catalin Marinas Cc: David Hildenbrand Cc: David Howells Cc: "Matthew Wilcox (Oracle)" Cc: SeongJae Park Cc: Sven Schnelle Cc: Will Deacon Cc: Yu Zhao Cc: Davidlohr Bueso Signed-off-by: Andrew Morton --- include/linux/mm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index cac845989bfd..3f9cf513e046 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2854,7 +2854,7 @@ 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; -- 2.50.1