X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;ds=inline;f=include%2Flttng%2Fringbuffer-config.h;h=ca52fc71fb02e90776e9d6157c9e100b5682f3fa;hb=d2428e875af8666473fb689429eaf1022862510d;hp=650b56b250db4dbb6d2889bff659c74fe1c20970;hpb=a8909ba54718ed54cefb1b839a5d41a065df09f9;p=lttng-ust.git

diff --git a/include/lttng/ringbuffer-config.h b/include/lttng/ringbuffer-config.h
index 650b56b2..ca52fc71 100644
--- a/include/lttng/ringbuffer-config.h
+++ b/include/lttng/ringbuffer-config.h
@@ -18,6 +18,14 @@
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
 #include <errno.h>
@@ -188,6 +196,10 @@ struct lttng_ust_lib_ring_buffer_config {
  * Context passed to lib_ring_buffer_reserve(), lib_ring_buffer_commit(),
  * lib_ring_buffer_try_discard_reserve(), lib_ring_buffer_align_ctx() and
  * lib_ring_buffer_write().
+ *
+ * IMPORTANT: this structure is part of the ABI between the probe and
+ * UST. Fields need to be only added at the end, never reordered, never
+ * removed.
  */
 #define LTTNG_UST_RING_BUFFER_CTX_PADDING	24
 struct lttng_ust_lib_ring_buffer_ctx {