WARNING: suspicious RCU usage in modeset_lock

[Tetsuo Handa]

On Wed, Dec 16, 2020 at 5:16 PM Paul E. McKenney <paulmck at kernel.org> wrote:
> In my experience, lockdep will indeed complain if an interrupt handler
> returns while in an RCU read-side critical section.

Can't we add lock status checks into the beginning and the end of interrupt handler functions
(e.g. whether "struct task_struct"->lockdep_depth did not change) ?