There's one thing which bugs me about the console code.
console_softint() calls change_console() calls kill_proc().
This means that we're delivering a signal from within a softirq. Looks
like it can call wake_up_process(), kmalloc(), etc, etc. It also checks
the permissions on *current!
Is all this activity legitimate from within a tasklet?
Secondly, this is all done with console_lock held, so if anyone does a
printk() will it not deadlock?
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