X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_types.h;fp=lib%2Fringbuffer%2Fbackend_types.h;h=4578185c3c75d8a1fb307a5e78ddbb1567bbd878;hb=5a8fd222992df9bbb709836e5bf4ca053dd776c3;hp=3d1fcc064a332973ce64449596866027bbfc6008;hpb=daaf627aaa66c434d9274c6616977a6edc07b6ca;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_types.h b/lib/ringbuffer/backend_types.h
index 3d1fcc06..4578185c 100644
--- a/lib/ringbuffer/backend_types.h
+++ b/lib/ringbuffer/backend_types.h
@@ -72,7 +72,12 @@ struct channel_backend {
 	u64 start_tsc;			/* Channel creation TSC value */
 	void *priv;			/* Client-specific information */
 	struct notifier_block cpu_hp_notifier;	 /* CPU hotplug notifier */
-	const struct lib_ring_buffer_config *config; /* Ring buffer configuration */
+	/*
+	 * We need to copy config because the module containing the
+	 * source config can vanish before the last reference to this
+	 * channel's streams is released.
+	 */
+	struct lib_ring_buffer_config config; /* Ring buffer configuration */
 	cpumask_var_t cpumask;		/* Allocated per-cpu buffers cpumask */
 	char name[NAME_MAX];		/* Channel name */
 };