X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=lttng-abi.c;h=a9e8d1d0423f4120144808585773c2234649a67e;hb=54028e45a003826223c6b7185a1e752ed7d0bcd1;hp=cffebcd8b0fc60a646101d02553bc87a269a6272;hpb=b773bad5f8ed0cbf0623b766d3c2bc4910b6e0cf;p=lttng-modules.git

diff --git a/lttng-abi.c b/lttng-abi.c
index cffebcd8..a9e8d1d0 100644
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -541,9 +541,11 @@ unsigned int lttng_metadata_ring_buffer_poll(struct file *filp,
 		if (finalized)
 			mask |= POLLHUP;
 
+		mutex_lock(&stream->metadata_cache->lock);
 		if (stream->metadata_cache->metadata_written >
 				stream->metadata_out)
 			mask |= POLLIN;
+		mutex_unlock(&stream->metadata_cache->lock);
 	}
 
 	return mask;
@@ -841,7 +843,6 @@ int lttng_abi_open_metadata_stream(struct file *channel_file)
 	metadata_stream->priv = buf;
 	stream_priv = metadata_stream;
 	metadata_stream->transport = channel->transport;
-	mutex_init(&metadata_stream->lock);
 
 	/*
 	 * Since life-time of metadata cache differs from that of