linux-kernel - Re: [PATCH 1/2] drivers: core: Don't try to use a dead glue

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Date:   Tue, 10 Jul 2018 16:55:37 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Joel Stanley <joel@....id.au>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] drivers: core: Don't try to use a dead glue_dir

On Tue, Jul 10, 2018 at 4:32 PM Benjamin Herrenschmidt
<benh@...nel.crashing.org> wrote:
>
> > I like that fix, which should make this patch obsolete, right?
>
> Yes, for that specific issue, but Linus seemed to think patch 1 was the
> "right thing to do" regardless...

I would definitely prefer either a kobject_get_unless_zero() or a
warning if it is ever zero.

The fact that right now it silently can do known bad things, and then
causes odd corruption _later_, is not good.

            Linus