<p></p>
<p><b>@benpicco</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/15442#discussion_r525048836">core/mutex.c</a>:</p>
<pre style='color:#555'>> @@ -33,21 +33,20 @@
 #define ENABLE_DEBUG 0
 #include "debug.h"
 
-int mutex_lock(mutex_t *mutex)
+/**
+ * @brief   Block waiting for a locked mutex
+ * @pre     IRQs are disabled
+ * @post    IRQs are enabled
</pre>
<p>so this is not true</p>

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