mm_all_locks_mutex 3467 mm/mmap.c      static DEFINE_MUTEX(mm_all_locks_mutex);
mm_all_locks_mutex 3554 mm/mmap.c      	mutex_lock(&mm_all_locks_mutex);
mm_all_locks_mutex 3633 mm/mmap.c      	BUG_ON(!mutex_is_locked(&mm_all_locks_mutex));
mm_all_locks_mutex 3643 mm/mmap.c      	mutex_unlock(&mm_all_locks_mutex);