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madvise: use split_vma() instead of __split_vma() 

The split_vma() wrapper is specifically for this use case, so use it.

[Liam.Howlett@oracle.com: fix VMA_ITERATOR start position]
  Link: https://lkml.kernel.org/r/20230125135809.85262-1-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20230120162650.984577-34-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 11:26:34 -05:00 committed by Andrew Morton
parent 9e56044625
commit 85ab779e34
1 changed files with 3 additions and 7 deletions
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10
mm/madvise.c
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@ -142,7 +142,7 @@ static int madvise_update_vma(struct vm_area_struct *vma,
struct mm_struct *mm = vma->vm_mm;
int error;
pgoff_t pgoff;
VMA_ITERATOR(vmi, mm, 0);
VMA_ITERATOR(vmi, mm, start);
if (new_flags == vma->vm_flags && anon_vma_name_eq(anon_vma_name(vma), anon_name)) {
*prev = vma;
@ -161,17 +161,13 @@ static int madvise_update_vma(struct vm_area_struct *vma,
*prev = vma;
if (start != vma->vm_start) {
if (unlikely(mm->map_count >= sysctl_max_map_count))
return -ENOMEM;
error = __split_vma(&vmi, vma, start, 1);
error = split_vma(&vmi, vma, start, 1);
if (error)
return error;
}
if (end != vma->vm_end) {
if (unlikely(mm->map_count >= sysctl_max_map_count))
return -ENOMEM;
error = __split_vma(&vmi, vma, end, 0);
error = split_vma(&vmi, vma, end, 0);
if (error)
return error;
}