From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Since there is no longer a linked list, the range_has_overlap() function
is identical to the find_vma_intersection() function.
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
---
mm/mmap.c | 28 +---------------------------
1 file changed, 1 insertion(+), 27 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 50b616449c87..01985a0d664e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -440,30 +440,6 @@ anon_vma_interval_tree_post_update_vma(struct vm_area_struct *vma)
anon_vma_interval_tree_insert(avc, &avc->anon_vma->rb_root);
}
-/*
- * range_has_overlap() - Check the @start - @end range for overlapping VMAs and
- * sets up a pointer to the previous VMA
- * @mm: the mm struct
- * @start: the start address of the range
- * @end: the end address of the range
- * @pprev: the pointer to the pointer of the previous VMA
- *
- * Returns: True if there is an overlapping VMA, false otherwise
- */
-static inline
-bool range_has_overlap(struct mm_struct *mm, unsigned long start,
- unsigned long end, struct vm_area_struct **pprev)
-{
- struct vm_area_struct *existing;
-
- MA_STATE(mas, &mm->mm_mt, start, start);
- rcu_read_lock();
- existing = mas_find(&mas, end - 1);
- *pprev = mas_prev(&mas, 0);
- rcu_read_unlock();
- return existing ? true : false;
-}
-
static unsigned long count_vma_pages_range(struct mm_struct *mm,
unsigned long addr, unsigned long end)
{
@@ -3210,9 +3186,7 @@ void exit_mmap(struct mm_struct *mm)
*/
int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)
{
- struct vm_area_struct *prev;
-
- if (range_has_overlap(mm, vma->vm_start, vma->vm_end, &prev))
+ if (find_vma_intersection(mm, vma->vm_start, vma->vm_end))
return -ENOMEM;
if ((vma->vm_flags & VM_ACCOUNT) &&
--
2.35.1
