linux-kernel - Re: vmlinux.o: warning: objtool: do_machine_check()+0x5fa: call to memset() leaves .noinstr.text section

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Date:   Wed, 19 Jan 2022 22:16:16 +0100
From:   Borislav Petkov <bp@...e.de>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     kernel test robot <lkp@...el.com>,
        "Paul E. McKenney" <paulmck@...nel.org>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: Re: vmlinux.o: warning: objtool: do_machine_check()+0x5fa: call to
 memset() leaves .noinstr.text section

On Wed, Jan 19, 2022 at 12:37:14PM -0800, Jakub Kicinski wrote:
> gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-3)

I have

$ gcc-8 --version
gcc-8 (SUSE Linux) 8.2.1 20180831 [gcc-8-branch revision 264010]

but I can't trigger anything with it either.

So I had a report about a randconfig from the 0day robot guys which
doesn't look like allmodconfig but which triggered some of the issues
you're seeing and I have fixes for that one which we wanna queue after
-rc1.

You could try them to see if they fix your warnings too. First take the
2 here:

https://lore.kernel.org/r/20220113155357.4706-1-bp@alien8.de

and then this one ontop:

https://lore.kernel.org/r/YeWsopFagTZ4W8WA@zn.tnic

Thx.
 
-- 
Regards/Gruss,
    Boris.

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