linux-kernel - Re: [PATCH 3/3] static_call: Fix static_call

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Date:   Thu, 18 Mar 2021 12:42:25 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org, jpoimboe@...hat.com, jbaron@...mai.com,
        rostedt@...dmis.org, ardb@...nel.org
Cc:     linux-kernel@...r.kernel.org, sumit.garg@...aro.org,
        oliver.sang@...el.com, jarkko@...nel.org
Subject: Re: [PATCH 3/3] static_call: Fix static_call_update() sanity check

On Thu, Mar 18, 2021 at 12:31:59PM +0100, Peter Zijlstra wrote:
> Sites that match init_section_contains() get marked as INIT. For
> built-in code init_sections contains both __init and __exit text. OTOH
> kernel_text_address() only explicitly includes __init text (and there
> are no __exit text markers).
> 
> Match what jump_label already does and ignore the warning for INIT
> sites. Also see the excellent changelog for commit: 8f35eaa5f2de
> ("jump_label: Don't warn on __exit jump entries")

Note that I initially had a different fix and thought jump_label was
broken for not patching, but then found the above commit.