diff options
| -rw-r--r-- | mm/mmap.c | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 3e5793ebbaae..141c618847ac 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2551,19 +2551,8 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma, /* Point of no return */ mm->locked_vm -= locked_vm; mm->map_count -= count; - /* - * Do not downgrade mmap_lock if we are next to VM_GROWSDOWN or - * VM_GROWSUP VMA. Such VMAs can change their size under - * down_read(mmap_lock) and collide with the VMA we are about to unmap. - */ - if (downgrade) { - if (next && (next->vm_flags & VM_GROWSDOWN)) - downgrade = false; - else if (prev && (prev->vm_flags & VM_GROWSUP)) - downgrade = false; - else - mmap_write_downgrade(mm); - } + if (downgrade) + mmap_write_downgrade(mm); /* * We can free page tables without write-locking mmap_lock because VMAs |