From cf6acf2a1a8717eb55aec8df79121ee6a75611f4 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 27 Jun 2013 03:18:41 +0200
Subject: [PATCH] buffer: add comment explaining buffer alignment

Avoids alignment issues (unaligned loads/stores) on ARM. Originally
added in commit 285d8c6.

Fixes #3030.
---
 lib/buffer.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/buffer.js b/lib/buffer.js
index 000c54b3a88..51406b6ed61 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -199,8 +199,8 @@ function Buffer(subject, encoding, offset) {
       if (!pool || pool.length - pool.used < this.length) allocPool();
       this.parent = pool;
       this.offset = pool.used;
-      pool.used += this.length;
-      if (pool.used & 7) pool.used = (pool.used + 8) & ~7;
+      // Align on 8 byte boundary to avoid alignment issues on ARM.
+      pool.used = (pool.used + this.length + 7) & ~7;
 
     } else {
       // Zero-length buffer