[PATCH 04/11] splice: lift pipe_lock out of splice_to_pipe()

[Linus Torvalds]

On Fri, Sep 23, 2016 at 1:10 PM, Al Viro <viro at zeniv.linux.org.uk> wrote:
>
> OTOH, considering the quality of documentation, I'm somewhat tempted to go
> for "sleep only if it had been completely full when we entered; once there's
> some space feed as much as fits and be done with that".  OTTH, I'm not sure
> that no userland cr^Hode will manage to be hurt by that variant...

Let's just try it.

If that then doesn't work, we can introduce your odd code (with a
*big* comment). Ok?

               Linus