linux-kernel - Re: [PATCH] timer: Provide wrappers safe for use with LOCKDEP

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Message-ID: <20171020075230.GA31536@infradead.org>
Date:   Fri, 20 Oct 2017 00:52:30 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Craig Gallek <cgallek@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] timer: Provide wrappers safe for use with LOCKDEP

On Thu, Oct 19, 2017 at 01:28:38PM -0700, Kees Cook wrote:
> Under LOCKDEP, the timer lock_class_key (set up in __setup_timer) needs
> to be tied to the caller's context, so an inline for timer_setup()
> won't work. We do, however, want to keep the inline version around for
> argument type checking, though, so this provides macro wrappers in the
> LOCKDEP case.

Heh, when I tried to do inline setup_timer Arnd had actually pointed
that out in the review..