From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sat, 23 Jul 2011 16:37:54 +0000 (-0400)
Subject: context: document and check that only last context is removed
X-Git-Tag: v2.0-pre2~1
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=4cae220c1be2cc73008603a21152fce7643cfc35;p=lttng-modules.git

context: document and check that only last context is removed

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/ltt-context.c b/ltt-context.c
index e9a45f3c..154e9966 100644
--- a/ltt-context.c
+++ b/ltt-context.c
@@ -60,6 +60,9 @@ struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p)
 }
 EXPORT_SYMBOL_GPL(lttng_append_context);
 
+/*
+ * Remove last context field.
+ */
 void lttng_remove_context_field(struct lttng_ctx **ctx_p,
 				struct lttng_ctx_field *field)
 {
@@ -67,6 +70,7 @@ void lttng_remove_context_field(struct lttng_ctx **ctx_p,
 
 	ctx = *ctx_p;
 	ctx->nr_fields--;
+	WARN_ON_ONCE(&ctx->fields[ctx->nr_fields] != field);
 	memset(&ctx->fields[ctx->nr_fields], 0, sizeof(struct lttng_ctx_field));
 }
 EXPORT_SYMBOL_GPL(lttng_remove_context_field);