tools/lguest: fix missing rmb().
authorRusty Russell <rusty@rustcorp.com.au>
Tue, 2 Jul 2013 06:05:13 +0000 (15:35 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Tue, 2 Jul 2013 06:12:04 +0000 (15:42 +0930)
The virtio spec was missing a barrier in example code, so I went back
to look at the lguest code.  Indeed, we need one.

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

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