On Wed, 5 Feb 2020 17:18:08 -0500 "Joel Fernandes (Google)" <joel@xxxxxxxxxxxxxxxxx> wrote: > set_ftrace_early_graph() sets pointers without any explicit > release-barriers. Let us use rcu_assign_pointer() to ensure the same. > > Note that ftrace_early_graph() calls ftrace_graph_set_hash() which does > do mutex_unlock(&ftrace_lock); which should imply a release barrier. > However it is better to not depend on it and just use > rcu_assign_pointer() which should also avoid sparse errors in the > future. This is going to have to wait for the next merge window, as I'm already *very* late, and I've pushed the limit to what I will add at this time frame. -- Steve
