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

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Message-ID: <2e34593e-65e3-df74-1280-5db6dc948130@redhat.com>
Date:   Fri, 27 May 2022 19:38:42 +0200
From:   Jesper Dangaard Brouer <jbrouer@...hat.com>
To:     Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        keliu <liuke94@...wei.com>
Cc:     brouer@...hat.com, 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 27/05/2022 19.08, Maciej Fijalkowski wrote:
> 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>

Could you use your full name with capital letters?

> 
> 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).

I agree.

Could you also take care of net/core/xdp.c ?

Patch LGTM

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>


>> ---
>>   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
>>
>