Jiri Slaby wrote: > OK, but read_unlock_irq() is not the right way to do it. It would enable > irqs unconditionally, so serial8250_tx_chars() would not thank you in > the above call chain. > > Plus the issues Jakub had with the patch. > > And what about ppp_synctty? Hmm... If the problem is the case of calling the function in serial8250_tx_chars(), I think it can be solved by continuing to use read_lock() in ppp_asynctty_wakeup() and getting the ap by not calling ap_get(). If I do this, will I be able to apply the existing patch to ap_get()? Thanks.
