Re: [BUG] ptraced process waiting on syscall may return kernel internal errnos

[Paul Mackerras <paulus@samba.org>]

Linus Torvalds writes:

> So I think that the *right* place to clear TIF_SIGPENDING is actually in 
> "get_signal_to_deliver()", because that function is called _only_ by the 
> actual per-architecture "I'm going to deliver a signal now".

I agree that's the right place for real user processes, but I note
that there are drivers that have kernel threads that do basically
this:

	if (signal_pending(current))
		dequeue_signal(current, ...);

for example, drivers/block/nbd.c, and obviously they don't want to
still see signal_pending(current) after they have dequeued all the
pending signals.

Paul.
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