From: Vladimir Oltean <olteanv@gmail.com>
Date: Fri, 24 Feb 2023 23:53:49 +0200

On Fri, Feb 24, 2023 at 05:07:01PM +0100, Alexander Lobakin wrote:

quoted

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.

Yeah it's an online compiler, which can spit out assembly code. For
testing non-complex stuff or macros it's often enough.

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

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

Oh, nice! I didn't know Kbuild has capability of listing the assembly
code built-in. I was adding it manually to Makefiles when needed >_<
Thanks! :D

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

Thanks,
Olek