netdev - Re: [RFC net-next 1/3] net: provide macros for commonly copied lockless queue stop/wake code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230311082826.3d2050c9@hermes.local>
Date:   Sat, 11 Mar 2023 08:28:26 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
        pabeni@...hat.com, alexanderduyck@...com, roman.gushchin@...ux.dev
Subject: Re: [RFC net-next 1/3] net: provide macros for commonly copied
 lockless queue stop/wake code

On Fri, 10 Mar 2023 21:01:28 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> A lot of drivers follow the same scheme to stop / start queues
> without introducing locks between xmit and NAPI tx completions.
> I'm guessing they all copy'n'paste each other's code.
> 
> Smaller drivers shy away from the scheme and introduce a lock
> which may cause deadlocks in netpoll.
> 
> Provide macros which encapsulate the necessary logic.

Could any of these be inline functions instead for type safety?