Hi when I review the code, I find the following scenario will lead to a race , but I am not sure whether the real issue will hit or not.
cpu1 cpu2
exit_mmap mmu_notifier_unregister
__mmu_notifier_release srcu_read_lock
srcu_read_lock
mm->ops->release(mn, mm) mm->ops->release(mn,mm)
srcu_read_unlock
srcu_read_unlock
obviously, the specified mm will call identical release function when
the related condition satisfy. is it right?
Thanks
zhongjiang
