[36/94] mm: Optimize find_exact_vma() to use vma_lookup()
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Message ID 20210428153542.2814175-37-Liam.Howlett@Oracle.com
State New, archived
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Commit Message

Liam Howlett April 28, 2021, 3:36 p.m. UTC
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 <Liam.Howlett@Oracle.com>
 include/linux/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/include/linux/mm.h b/include/linux/mm.h
index 146976070fed..cf17491be249 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2733,7 +2733,7 @@  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;