From: Russ Cox <rsc@golang.org>
Date: Tue, 13 Aug 2013 20:16:05 +0000 (-0400)
Subject: sync/atomic: update comment for ARM 64-bit atomics
X-Git-Tag: go1.2rc2~612
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=2642c6e24dd3d935d01270a0fa0a89de3d3dae69;p=gostls13.git

sync/atomic: update comment for ARM 64-bit atomics

They don't work on older chips, just like the x86-32 64-bit atomics.

Update #6134

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12880043
---

diff --git a/src/pkg/sync/atomic/doc.go b/src/pkg/sync/atomic/doc.go
index 4651e2e8c2..34a2bc1390 100644
--- a/src/pkg/sync/atomic/doc.go
+++ b/src/pkg/sync/atomic/doc.go
@@ -47,6 +47,8 @@ import (
 
 // BUG(rsc): On x86-32, the 64-bit functions use instructions unavailable before the Pentium MMX.
 //
+// On non-Linux ARM, the 64-bit functions use instructions unavailable before the ARMv6k core.
+//
 // On both ARM and x86-32, it is the caller's responsibility to arrange for 64-bit
 // alignment of 64-bit words accessed atomically. The first word in a global
 // variable or in an allocated struct or slice can be relied upon to be