linux-kernel - Re: [PATCH v4 5/9] vsprintf: Factor out %p[iI] handler as ip_addr

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Message-ID: <1523111455.21176.418.camel@linux.intel.com>
Date:   Sat, 07 Apr 2018 17:30:55 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        "Tobin C . Harding" <me@...in.cc>, Joe Perches <joe@...ches.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.cz>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/9] vsprintf: Factor out %p[iI] handler as
 ip_addr_string()

On Wed, 2018-04-04 at 10:58 +0200, Petr Mladek wrote:
> Move the non-trivial code from the long pointer() function. We are
> going
> to add a check for the access to the address that will make it even
> more
> complicated.
> 
> Also it is better to warn about unknown specifier instead of falling
> back to the %p behavior. It will help people to understand what is
> going wrong. They expect the IP address and not a pointer anyway
> in this situation.

> +	WARN_ONCE(1, "Unsupported pointer format specifier:
> %%p%c%c\n",
> +		  fmt[0], fmt[1]);
> 

I think WARN is too much here.

pr_warn_once() ?


-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy