diff mbox series

[v4,13/49] mmap: Convert vma_expand() to use vma iterator

Message ID 20230120162650.984577-14-Liam.Howlett@oracle.com
State New
Headers
Series VMA tree type safety and remove __vma_adjust() |

Commit Message

Liam R. Howlett Jan. 20, 2023, 4:26 p.m. UTC 
  From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Use the vma iterator instead of the maple state for type safety and for
consistency through the mm code.

Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
 mm/mmap.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/mm/mmap.c b/mm/mmap.c
index 18f5f71a9202..2ec671a119c1 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -527,7 +527,7 @@  static int vma_link(struct mm_struct *mm, struct vm_area_struct *vma)
  *
  * Returns: 0 on success
  */
-inline int vma_expand(struct ma_state *mas, struct vm_area_struct *vma,
+inline int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
 		      unsigned long start, unsigned long end, pgoff_t pgoff,
 		      struct vm_area_struct *next)
 {
@@ -556,7 +556,7 @@  inline int vma_expand(struct ma_state *mas, struct vm_area_struct *vma,
 	/* Only handles expanding */
 	VM_BUG_ON(vma->vm_start < start || vma->vm_end > end);
 
-	if (mas_preallocate(mas, GFP_KERNEL))
+	if (vma_iter_prealloc(vmi))
 		goto nomem;
 
 	vma_adjust_trans_huge(vma, start, end, 0);
@@ -581,8 +581,7 @@  inline int vma_expand(struct ma_state *mas, struct vm_area_struct *vma,
 	vma->vm_start = start;
 	vma->vm_end = end;
 	vma->vm_pgoff = pgoff;
-	/* Note: mas must be pointing to the expanding VMA */
-	vma_mas_store(vma, mas);
+	vma_iter_store(vmi, vma);
 
 	if (file) {
 		vma_interval_tree_insert(vma, root);
@@ -2600,7 +2599,7 @@  unsigned long mmap_region(struct file *file, unsigned long addr,
 
 	/* Actually expand, if possible */
 	if (vma &&
-	    !vma_expand(&vmi.mas, vma, merge_start, merge_end, vm_pgoff, next)) {
+	    !vma_expand(&vmi, vma, merge_start, merge_end, vm_pgoff, next)) {
 		khugepaged_enter_vma(vma, vm_flags);
 		goto expanded;
 	}