From de4de65d46ff4f0fab913e7a7414855b89b90c98 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@cloudius-systems.com>
Date: Tue, 14 Oct 2014 18:02:52 +0300
Subject: [PATCH] virtio: convert vring::post() to accept an iterator to a
 range

Instead of an iterator to a vector of buffers, accept an iterator
to a container of buffers, increasing flexibility for callers.
---
 net/virtio.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/virtio.cc b/net/virtio.cc
index dcb1b0be5b..3783ea5870 100644
--- a/net/virtio.cc
+++ b/net/virtio.cc
@@ -271,7 +271,10 @@ void vring::run() {
 
 template <typename Iterator>
 void vring::post(Iterator begin, Iterator end) {
-    std::for_each(begin, end, [&] (buffer_chain& bc) {
+    // Note: buffer_chain here is any container of buffer, not
+    //       necessarily vector<buffer>.
+    using buffer_chain = decltype(*begin);
+    std::for_each(begin, end, [this] (buffer_chain bc) {
         bool has_prev = false;
         unsigned prev_desc_idx = 0;
         for (auto i = bc.rbegin(); i != bc.rend(); ++i) {