diff mbox series

[v4,34/35] mm: Add vma_iter_{next,prev}_range() to vma iterator

Message ID 20230518145544.1722059-35-Liam.Howlett@oracle.com (mailing list archive)
State New
Headers show
Series Maple tree mas_{next,prev}_range() and cleanup | expand

Commit Message

Liam R. Howlett May 18, 2023, 2:55 p.m. UTC 
Add functionality to the VMA iterator to advance and retreat one offset
within the maple tree, regardless of the value contained.  This can lead
to less re-walking to find an area of interest, especially when there is
nothing in that offset.

Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
 include/linux/mm.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b1d4e7393ef..1bd731a2972b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -866,11 +866,24 @@  static inline struct vm_area_struct *vma_next(struct vma_iterator *vmi)
 	return mas_find(&vmi->mas, ULONG_MAX);
 }
 
+static inline
+struct vm_area_struct *vma_iter_next_range(struct vma_iterator *vmi)
+{
+	return mas_next_range(&vmi->mas, ULONG_MAX);
+}
+
+
 static inline struct vm_area_struct *vma_prev(struct vma_iterator *vmi)
 {
 	return mas_prev(&vmi->mas, 0);
 }
 
+static inline
+struct vm_area_struct *vma_iter_prev_range(struct vma_iterator *vmi)
+{
+	return mas_prev_range(&vmi->mas, 0);
+}
+
 static inline unsigned long vma_iter_addr(struct vma_iterator *vmi)
 {
 	return vmi->mas.index;