linux-kernel - Re: [PATCH 2/3] random: Return nbytes filled from hw RNG

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Message-ID: <20180502020722.GF3791@eros>
Date:   Wed, 2 May 2018 12:07:22 +1000
From:   "Tobin C. Harding" <me@...in.cc>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Theodore Ts'o <tytso@....edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 2/3] random: Return nbytes filled from hw RNG

On Tue, May 01, 2018 at 09:39:02PM -0400, Steven Rostedt wrote:
> On Wed,  2 May 2018 09:33:39 +1000
> "Tobin C. Harding" <me@...in.cc> wrote:
> 
> > diff --git a/drivers/char/random.c b/drivers/char/random.c
> > index 031d18b31e0f..3a66507ea60b 100644
> > --- a/drivers/char/random.c
> > +++ b/drivers/char/random.c
> > @@ -1725,26 +1725,28 @@ EXPORT_SYMBOL(del_random_ready_callback);
> >   * key known by the NSA).  So it's useful if we need the speed, but
> >   * only if we're willing to trust the hardware manufacturer not to
> >   * have put in a back door.
> > + *
> > + * Return number of bytes filled in.
> >   */
> > -void get_random_bytes_arch(void *buf, int nbytes)
> > +int __must_check get_random_bytes_arch(void *buf, int nbytes)
> 
> The "__must_check" makes no sense in the C file. It belongs in the
> header file. There wont be any complaint about it here.

Oh thanks.

/steve schooling noobs all day long