linux-kernel - Re: [PATCH 2/2] recordmcount: Handle sections with no non-weak symbols

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Message-ID: <20220428100602.7b215e52@gandalf.local.home>
Date:   Thu, 28 Apr 2022 10:06:02 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        llvm@...ts.linux.dev, Michael Ellerman <mpe@...erman.id.au>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH 2/2] recordmcount: Handle sections with no non-weak
 symbols

On Thu, 28 Apr 2022 13:15:22 +0530
"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com> wrote:

> Indeed, plain old -pg will be a problem. I'm not sure there is a generic 
> way to address this. I suppose architectures will have to validate the 
> mcount locations, something like this?

Perhaps another solution is to make the mcount locations after the linking
is done. The main downside to that is that it takes time to go over the
entire vmlinux, and will slow down a compile that only modified a couple of
files.

-- Steve