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mmap: use vmi version of vma_merge()

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

Link: https://lkml.kernel.org/r/20230120162650.984577-26-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-01-20 11:26:26 -05:00 committed by Andrew Morton
parent 0c0c5bffd0
commit 076f16bf76
1 changed files with 5 additions and 3 deletions
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8
mm/mmap.c
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@ -2690,8 +2690,9 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
* vma again as we may succeed this time.
*/
if (unlikely(vm_flags != vma->vm_flags && prev)) {
merge = vma_merge(mm, prev, vma->vm_start, vma->vm_end, vma->vm_flags,
NULL, vma->vm_file, vma->vm_pgoff, NULL, NULL_VM_UFFD_CTX, NULL);
merge = vmi_vma_merge(&vmi, mm, prev, vma->vm_start,
vma->vm_end, vma->vm_flags, NULL, vma->vm_file,
vma->vm_pgoff, NULL, NULL_VM_UFFD_CTX, NULL);
if (merge) {
/*
* ->mmap() can change vma->vm_file and fput
@ -3232,6 +3233,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
struct mm_struct *mm = vma->vm_mm;
struct vm_area_struct *new_vma, *prev;
bool faulted_in_anon_vma = true;
VMA_ITERATOR(vmi, mm, addr);
validate_mm_mt(mm);
/*
@ -3247,7 +3249,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
if (new_vma && new_vma->vm_start < addr + len)
return NULL; /* should never get here */
new_vma = vma_merge(mm, prev, addr, addr + len, vma->vm_flags,
new_vma = vmi_vma_merge(&vmi, mm, prev, addr, addr + len, vma->vm_flags,
vma->anon_vma, vma->vm_file, pgoff, vma_policy(vma),
vma->vm_userfaultfd_ctx, anon_vma_name(vma));
if (new_vma) {