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91d5185187
This is needed by rust/helpers/srcu.c which now adds rust_helper_srcu_readers_active() as a wrapper around the SRCU helper for Rust callers. To achive this: 1- Move the srcu_readers_active() implementation from "kernel/rcu/srcutree.c" to "include/linux/srcutree.h". 2- Implement a matching srcu_readers_active() in "include/linux/srcutiny.h" and use it on the existing open-coded WARN_ON() check in cleanup_srcu_struct(). Signed-off-by: Onur Özkan <work@onurozkan.dev> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Boqun Feng <boqun@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>