linux-kernel - Re: [PATCH RESEND] lib/test_printf.c: call wait_for_random

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Date:   Mon, 25 Jun 2018 09:50:20 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Thierry Escande <thierry.escande@...aro.org>,
        David Miller <davem@...emloft.net>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        "Tobin C . Harding" <me@...in.cc>, linux-kernel@...r.kernel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH RESEND] lib/test_printf.c: call wait_for_random_bytes()
 before plain %p tests

On Fri 2018-06-22 23:50:20, Thierry Escande wrote:
> On 22/06/2018 22:53, Steven Rostedt wrote:
> > On Thu, Jun 07, 2018 at 02:24:34PM +0200, Petr Mladek wrote:
> > > On Mon 2018-06-04 13:37:08, Thierry Escande wrote:
> > > > If the test_printf module is loaded before the crng is initialized, the
> > > > plain 'p' tests will fail because the printed address will not be hashed
> > > > and the buffer will contain '(ptrval)' instead.
> > > > This patch adds a call to wait_for_random_bytes() before plain 'p' tests
> > > > to make sure the crng is initialized.
> > > 
> > > Hmm, my system did not boot with this patch and
> > > CONFIG_TEST_PRINTF=y
> > 
> > And neither does my test box. It killed my tests I was running, as one of the
> > configs I test has this set.
> > 
> > It appears that Andrew pulled it in and sent it to Linus, as it is in
> > 4.18-rc1, and I need to now revert this patch to make my tests work.
> 
> This patch has been superseded with a v2 and a v3 pushed into Petr
> printk.git tree (https://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk.git/commit/?h=for-4.19&id=ce041c43f22298485122bab15c14d062383fbc67).
> Sorry for the mess...

Andrew,

should I send the revert and the better fix to Linus or would you like
to do so?

Best Regards,
Petr