urcu-defer: generate linker error if call_rcu() is used

[urcu.git] / README

diff --git a/README b/README
index e1ce893737acd0d4d79260462f6383ff45a05c42..af0a9c2d3d50b13c8057f4eb65aeb7df8bea74bb 100644 (file)
--- a/README
+++ b/README
@@ -107,6 +107,11 @@ Usage of liburcu-defer
        * Provides defer_rcu_ratelimit() primitive, which acts just like
          defer_rcu(), but takes an additional rate limiter callback forcing
          synchronized callback execution of the limiter returns non-zero.
+       * Requires that rcu_defer_barrier() must be called in library destructor
+         if a library queues callbacks and is expected to be unloaded with
+         dlclose().
+       * Its API is currently experimental. It may change in future library
+         releases.
 
 Being careful with signals