+// SPDX-FileCopyrightText: 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: MIT
+
/*
- * SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* This contains the core definitions for the Linux Trace Toolkit.
*/
#include <lttng/ust-version.h>
/*
- * Default to having the content of the ringbuffer respect the natural
- * alignment of the system. Only pack its content on architectures we know
- * have efficient unaligned memory access.
+ * On architectures without efficient unaligned accesses, the layout of
+ * the ringbuffer's content respects the natural alignment of the
+ * system. Only pack its content on architectures we know have efficient
+ * unaligned memory access.
+ *
+ * Whether to pack the ring buffer contents or not is part of the ABI
+ * between the probe providers and the tracer, and is selected by the
+ * lttng/ust-arch.h header.
*/
#ifndef LTTNG_UST_ARCH_HAS_EFFICIENT_UNALIGNED_ACCESS
#define LTTNG_UST_RING_BUFFER_NATURAL_ALIGN