netdev - Re: [PATCH net-next 00/15] in_interrupt() cleanup, part 2

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Date:   Sat, 31 Oct 2020 10:08:09 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     netdev@...r.kernel.org, Aymen Sghaier <aymen.sghaier@....com>,
        Daniel Drake <dsd@...too.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Horia Geantă <horia.geanta@....com>,
        Jon Mason <jdmason@...zu.us>, Jouni Malinen <j@...fi>,
        Kalle Valo <kvalo@...eaurora.org>,
        Leon Romanovsky <leon@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-rdma@...r.kernel.org,
        linux-wireless@...r.kernel.org, Li Yang <leoyang.li@....com>,
        Madalin Bucur <madalin.bucur@....com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Rain River <rain.1986.08.12@...il.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Samuel Chessman <chessman@....org>,
        Ulrich Kunitz <kune@...ne-taler.de>,
        Zhu Yanjun <zyjzyj2000@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH net-next 00/15] in_interrupt() cleanup, part 2

On Tue, 27 Oct 2020 23:54:39 +0100 Sebastian Andrzej Siewior wrote:
> Folks,
> 
> in the discussion about preempt count consistency across kernel configurations:
> 
>   https://lore.kernel.org/r/20200914204209.256266093@linutronix.de/
> 
> Linus clearly requested that code in drivers and libraries which changes
> behaviour based on execution context should either be split up so that
> e.g. task context invocations and BH invocations have different interfaces
> or if that's not possible the context information has to be provided by the
> caller which knows in which context it is executing.
> 
> This includes conditional locking, allocation mode (GFP_*) decisions and
> avoidance of code paths which might sleep.
> 
> In the long run, usage of 'preemptible, in_*irq etc.' should be banned from
> driver code completely.
> 
> This is part two addressing remaining drivers except for orinoco-usb.

Sebastian, thanks for there, I picked up only the Ethernet patches:

5ce7f3f46f6b net: neterion: s2io: Replace in_interrupt() for context detection
dc5e8bfcd12e net: forcedeth: Replace context and lock check with a lockdep_assert()
beca92820dc4 net: tlan: Replace in_irq() usage

Please repost the wireless stuff for Kalle to linux-wireless@...r, 
and repost the fsl stuff separately (our patchwork queue is huge, 
I can't keep this waiting for an ack any longer).