Implement wrapper around get_pfnblock_flags_mask

[lttng-modules.git] / lttng-abi.c

diff --git a/lttng-abi.c b/lttng-abi.c
index 64af55fb24938db7491a39483dd2071d0c7ede3d..a9e8d1d0423f4120144808585773c2234649a67e 100644 (file)
--- 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;