Re: [PATCH 6.11.y 1/2] rcu/kvfree: Add kvfree_rcu_barrier() API

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Oct 21, 2024 at 10:10:02AM -0700, Suren Baghdasaryan wrote:
> From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
> 
> From: Uladzislau Rezki <urezki@gmail.com>
> 
> commit 3c5d61ae919cc377c71118ccc76fa6e8518023f8 upstream.
> 
> Add a kvfree_rcu_barrier() function. It waits until all
> in-flight pointers are freed over RCU machinery. It does
> not wait any GP completion and it is within its right to
> return immediately if there are no outstanding pointers.
> 
> This function is useful when there is a need to guarantee
> that a memory is fully freed before destroying memory caches.
> For example, during unloading a kernel module.
> 
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> ---
>  include/linux/rcutiny.h |   5 ++
>  include/linux/rcutree.h |   1 +
>  kernel/rcu/tree.c       | 109 +++++++++++++++++++++++++++++++++++++---
>  3 files changed, 107 insertions(+), 8 deletions(-)

We need a signed-off-by line from you, as you did the backport here,
please fix that up and resend this series.

thanks,

greg k-h