Re: [PATCH v8 2/4] srcu: expose srcu_readers_active()

[Gary Guo]

On Fri May 29, 2026 at 12:43 PM BST, Onur Özkan wrote:
> 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().
> 
> Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> Signed-off-by: Onur Özkan <work@xxxxxxxxxxxxx>

Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>

> ---
>  include/linux/srcutiny.h | 13 +++++++++++++
>  include/linux/srcutree.h | 24 ++++++++++++++++++++++++
>  kernel/rcu/srcutiny.c    |  2 +-
>  kernel/rcu/srcutree.c    | 25 -------------------------
>  rust/helpers/srcu.c      |  5 +++++
>  5 files changed, 43 insertions(+), 26 deletions(-)