diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 7bd1caa09ddd..4a9466b76648 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3642,6 +3642,12 @@ int mm_take_all_locks(struct mm_struct *mm) mutex_lock(&mm_all_locks_mutex); + /* + * vma_start_write() does not have a complement in mm_drop_all_locks() + * because vma_start_write() is always asymmetrical; it marks a VMA as + * being written to until mmap_write_unlock() or mmap_write_downgrade() + * is reached. + */ mas_for_each(&mas, vma, ULONG_MAX) { if (signal_pending(current)) goto out_unlock; @@ -3738,7 +3744,6 @@ void mm_drop_all_locks(struct mm_struct *mm) if (vma->vm_file && vma->vm_file->f_mapping) vm_unlock_mapping(vma->vm_file->f_mapping); } - vma_end_write_all(mm); mutex_unlock(&mm_all_locks_mutex); } |