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-rw-r--r--libgo/go/sync/atomic/doc.go5
1 files changed, 5 insertions, 0 deletions
diff --git a/libgo/go/sync/atomic/doc.go b/libgo/go/sync/atomic/doc.go
index 1335def59f6..ec5a0d33af1 100644
--- a/libgo/go/sync/atomic/doc.go
+++ b/libgo/go/sync/atomic/doc.go
@@ -55,3 +55,8 @@ func AddUint64(val *uint64, delta uint64) (new uint64)
// AddUintptr atomically adds delta to *val and returns the new value.
func AddUintptr(val *uintptr, delta uintptr) (new uintptr)
+
+// Helper for ARM. Linker will discard on other systems
+func panic64() {
+ panic("sync/atomic: broken 64-bit atomic operations (buggy QEMU)")
+}