X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-ring-buffer-client.h;fp=lttng-ring-buffer-client.h;h=7cf3a4c81861987f88bc4057bd3c1049d6f05897;hb=e755470cf63434d615dbae9abf550bb2cd953c6a;hp=8b87db0d4ca47e3d7e0b696db0002efb30b59a34;hpb=b055caba03c71b621bff8ec9caa0e041ac6489a9;p=lttng-modules.git

diff --git a/lttng-ring-buffer-client.h b/lttng-ring-buffer-client.h
index 8b87db0d..7cf3a4c8 100644
--- a/lttng-ring-buffer-client.h
+++ b/lttng-ring-buffer-client.h
@@ -636,15 +636,15 @@ int lttng_event_reserve(struct lib_ring_buffer_ctx *ctx,
 	struct lttng_client_ctx client_ctx;
 	int ret, cpu;
 
-	/* Compute internal size of context structures. */
-	ctx_get_struct_size(lttng_chan->ctx, &client_ctx.packet_context_len, lttng_chan, ctx);
-	ctx_get_struct_size(event->ctx, &client_ctx.event_context_len, lttng_chan, ctx);
-
 	cpu = lib_ring_buffer_get_cpu(&client_config);
 	if (unlikely(cpu < 0))
 		return -EPERM;
 	ctx->cpu = cpu;
 
+	/* Compute internal size of context structures. */
+	ctx_get_struct_size(lttng_chan->ctx, &client_ctx.packet_context_len, lttng_chan, ctx);
+	ctx_get_struct_size(event->ctx, &client_ctx.event_context_len, lttng_chan, ctx);
+
 	switch (lttng_chan->header_type) {
 	case 1:	/* compact */
 		if (event_id > 30)