linux-kernel - Re: [PATCH] net: xdp: Directly use ida

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Message-ID: <YpEFpVkxRRFi+Cs8@boxer>
Date:   Fri, 27 May 2022 19:08:53 +0200
From:   Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To:     keliu <liuke94@...wei.com>
Cc:     bjorn@...nel.org, magnus.karlsson@...el.com,
        jonathan.lemon@...il.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, ast@...nel.org,
        daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: xdp: Directly use ida_alloc()/free()

On Fri, May 27, 2022 at 06:46:09AM +0000, keliu wrote:
> Use ida_alloc()/ida_free() instead of deprecated
> ida_simple_get()/ida_simple_remove() .
> 
> Signed-off-by: keliu <liuke94@...wei.com>

Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

For future AF_XDP related patches please specify the bpf-next tree in the
patch subject (or bpf if it's a fix).

Thanks!

> ---
>  net/xdp/xdp_umem.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
> index f01ef6bda390..869b9b9b9fad 100644
> --- a/net/xdp/xdp_umem.c
> +++ b/net/xdp/xdp_umem.c
> @@ -57,7 +57,7 @@ static int xdp_umem_addr_map(struct xdp_umem *umem, struct page **pages,
>  static void xdp_umem_release(struct xdp_umem *umem)
>  {
>  	umem->zc = false;
> -	ida_simple_remove(&umem_ida, umem->id);
> +	ida_free(&umem_ida, umem->id);
>  
>  	xdp_umem_addr_unmap(umem);
>  	xdp_umem_unpin_pages(umem);
> @@ -242,7 +242,7 @@ struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr)
>  	if (!umem)
>  		return ERR_PTR(-ENOMEM);
>  
> -	err = ida_simple_get(&umem_ida, 0, 0, GFP_KERNEL);
> +	err = ida_alloc(&umem_ida, GFP_KERNEL);
>  	if (err < 0) {
>  		kfree(umem);
>  		return ERR_PTR(err);
> @@ -251,7 +251,7 @@ struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr)
>  
>  	err = xdp_umem_reg(umem, mr);
>  	if (err) {
> -		ida_simple_remove(&umem_ida, umem->id);
> +		ida_free(&umem_ida, umem->id);
>  		kfree(umem);
>  		return ERR_PTR(err);
>  	}
> -- 
> 2.25.1
>