linux-kernel - Re: [PATCH 03/13] livepatch: refactor klp_init

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Message-ID: <20210128162446.GA3883@lst.de>
Date:   Thu, 28 Jan 2021 17:24:46 +0100
From:   Christoph Hellwig <hch@....de>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Christoph Hellwig <hch@....de>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Jessica Yu <jeyu@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jiri Kosina <jikos@...nel.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        dri-devel@...ts.freedesktop.org, live-patching@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 03/13] livepatch: refactor klp_init_object

On Thu, Jan 28, 2021 at 05:22:40PM +0100, Christoph Hellwig wrote:
> > We need to either update the function description or keep this check.
> > 
> > I prefer to keep the check. The function does the right thing also
> > for the object "vmlinux". Also the livepatch code includes many
> > similar paranoid checks that makes the code less error prone
> > against any further changes.
> 
> Well, the check is in the caller now where we have a conditional for
> it.  So I'd be tempted to either update the comment, or just drop the
> patch.

Also even without the check I think it will do the right thing when
called for vmlinux given that it simplify won't find a module called
vmlinux..