From 2642c6e24dd3d935d01270a0fa0a89de3d3dae69 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Tue, 13 Aug 2013 16:16:05 -0400 Subject: [PATCH] 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 --- src/pkg/sync/atomic/doc.go | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/pkg/sync/atomic/doc.go b/src/pkg/sync/atomic/doc.go index 4651e2e8c2b..34a2bc1390b 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