diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mremap.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index 366b3dea992c..c5590afe7165 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -493,7 +493,7 @@ static unsigned long move_vma(struct vm_area_struct *vma, unsigned long excess = 0; unsigned long hiwater_vm; int split = 0; - int err; + int err = 0; bool need_rmap_locks; /* @@ -503,6 +503,15 @@ static unsigned long move_vma(struct vm_area_struct *vma, if (mm->map_count >= sysctl_max_map_count - 3) return -ENOMEM; + if (vma->vm_ops && vma->vm_ops->may_split) { + if (vma->vm_start != old_addr) + err = vma->vm_ops->may_split(vma, old_addr); + if (!err && vma->vm_end != old_addr + old_len) + err = vma->vm_ops->may_split(vma, old_addr + old_len); + if (err) + return err; + } + /* * Advise KSM to break any KSM pages in the area to be moved: * it would be confusing if they were to turn up at the new |