From: Rusty Russell <rusty@rustcorp.com.au>
Date: Sat, 7 Dec 2013 07:10:47 +0000 (+1030)
Subject: io: io_always, and zero-length operations support.
X-Git-Url: http://git.ozlabs.org/?a=commitdiff_plain;ds=sidebyside;h=12ab811533406e22b78ce8b227474f1056375ae4;hp=12ab811533406e22b78ce8b227474f1056375ae4;p=ccan

io: io_always, and zero-length operations support.

A zero-length read should complete immediately, even if the fd isn't readable.
Wire this up, and expose it for callers to use.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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