block_all_signals() usage in DRM

[Richard Weinberger]

Hi!

drivers/gpu/drm/drm_lock.c is the only remaining user of block_all_signals():
        /* don't set the block all signals on the master process for now
         * really probably not the correct answer but lets us debug xkb
         * xserver for now */
        if (!file_priv->is_master) {
                sigemptyset(&dev->sigmask);
                sigaddset(&dev->sigmask, SIGSTOP);
                sigaddset(&dev->sigmask, SIGTSTP);
                sigaddset(&dev->sigmask, SIGTTIN);
                sigaddset(&dev->sigmask, SIGTTOU);
                dev->sigdata.context = lock->context;
                dev->sigdata.lock = master->lock.hw_lock;
                block_all_signals(drm_notifier, dev, &dev->sigmask);
        }

Is this functionality still in use/needed?
Otherwise we could get rid of block_all_signals() and unpuzzle the signaling
code a bit. :-)

Thanks,
//richard