linux-kernel - Re: [PATCH v2 net-next 3/5] net: dsa: microchip: add eth mac grouping for ethtool statistics

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Date:   Fri, 24 Feb 2023 23:53:49 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Alexander Lobakin <aleksander.lobakin@...el.com>
Cc:     Rakesh Sankaranarayanan <rakesh.sankaranarayanan@...rochip.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        andrew@...n.ch, f.fainelli@...il.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Subject: Re: [PATCH v2 net-next 3/5] net: dsa: microchip: add eth mac
 grouping for ethtool statistics

On Fri, Feb 24, 2023 at 05:07:01PM +0100, Alexander Lobakin wrote:
> It's not so common for people to show up back in the thread after you
> ask them to show godbolt / asm code comparison.

idk what godbolt is, but if it's some sort of online compiler, then I
suppose it's of limited usefulness for the Linux kernel.

Easiest way to see a disassembly (also has C code interleaved) would be
this:

make drivers/net/dsa/microchip/ksz_ethtool.lst

This is also useful to see precisely which instruction went boom in case
there's a NULL pointer dereference or something like that.