rcu: Remove unused func parameter from callback-enqueue functions

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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>

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This commit is contained in:

Joel Fernandes 2026-07-18 13:15:34 -04:00 • committed by Paul E. McKenney

parent 4137d69124

commit 545b3ac4c1

3 changed files with 9 additions and 9 deletions

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10

kernel/rcu/tree.c

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2

kernel/rcu/tree.h

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6

kernel/rcu/tree_nocb.h

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