rcu: Remove unused func parameter from callback-enqueue functions

Ever since the kvfree_rcu() tracing moved out of the callback-enqueue
path, rcutree_enqueue() no longer looks at the callback function
pointer:  By the time it is invoked, __call_rcu_common() has already
stored the function into rhp->func, and the enqueue path only adds
the rcu_head to the segmented callback list and emits tracepoints
that do not take the function pointer.

Nevertheless, the function pointer is still threaded through
call_rcu_core(), call_rcu_nocb(), and rcutree_enqueue(), forcing
each level to carry a dead argument.

Remove the parameter from all three functions, from the no-CBs stub,
and from the corresponding declarations.  Anything needing the
callback function can still get it from rhp->func.

No functional change.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

0 files changed, 0 insertions, 0 deletions