[PATCH v3 26/48] mm/mremap: Use vmi version of vma_merge()

Liam Howlett
2023-01-17T02:36:41Z

Use the vma iterator so that the iterator can be invalidated or updated
to avoid each caller doing so.

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

diff --git a/mm/mremap.c b/mm/mremap.c
index 94d2590f0871..4364daaf0e83 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -1018,6 +1018,7 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
unsigned long extension_end = addr + new_len;
pgoff_t extension_pgoff = vma->vm_pgoff +
((extension_start - vma->vm_start) >> PAGE_SHIFT);
+ VMA_ITERATOR(vmi, mm, extension_start);

if (vma->vm_flags & VM_ACCOUNT) {
if (security_vm_enough_memory_mm(mm, pages)) {
@@ -1033,10 +1034,10 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
* with the next vma if it becomes adjacent to the expanded vma and
* otherwise compatible.
*/
- vma = vma_merge(mm, vma, extension_start, extension_end,
- vma->vm_flags, vma->anon_vma, vma->vm_file,
- extension_pgoff, vma_policy(vma),
- vma->vm_userfaultfd_ctx, anon_vma_name(vma));
+ vma = vmi_vma_merge(&vmi, mm, vma, extension_start,
+ extension_end, vma->vm_flags, vma->anon_vma,
+ vma->vm_file, extension_pgoff, vma_policy(vma),
+ vma->vm_userfaultfd_ctx, anon_vma_name(vma));
if (!vma) {
vm_unacct_memory(pages);
ret = -ENOMEM;
--
2.35.1