Re: Spinlock debugging

[Sergei Organov]

Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> writes:
[...]
> So all you need in your IRQ handler is
>
> 	if (tty_insert_flip_string(tty, buf, size))
> 		tty_flip_buffer_push(tty);

What is the purpose of the "if" in the above code?  is push with no data
in the buffer dangerous? Or is it just optimization of
almost-never-taken path? ;)

-- Sergei.
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