linux-kernel - An objtool warning from mainline

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Message-ID: <02bd36cf-b2b8-4634-a70b-1476420188c8@paulmck-laptop>
Date:   Wed, 26 Apr 2023 16:50:49 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     jpoimboe@...nel.org, peterz@...radead.org, bp@...en8.de
Cc:     linux-kernel@...r.kernel.org
Subject: An objtool warning from mainline

Hello!

I am seeing a couple of objtool warnings in allmodconfig builds in
current mainline.  One of them is fixed by Borislav's patch [1], but I
do not see a fix for the other one:

vmlinux.o: warning: objtool: exc_nmi+0x2b3: call to __const_udelay() leaves .noinstr.text section

Borislav's older fix [2] is in tree.

I see this with gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04) and also with
gcc version 8.5.0 20210514 (Red Hat 8.5.0-18) (GCC).

Thoughts?

							Thanx, Paul

[1] https://www.spinics.net/lists/kernel/msg4697317.html
[2] https://lore.kernel.org/lkml/20211104144035.20107-13-bp@alien8.de/