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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Petr Mladek <pmladek@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	"Tobin C . Harding" <me@tobin.cc>, Joe Perches <joe@perches.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@suse.cz>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH v4 2/9] vsprintf: Consistent %pK handling for kptr_restrict == 0
Date: Mon, 09 Apr 2018 15:11:59 +0300	[thread overview]
Message-ID: <1523275919.21176.429.camel@linux.intel.com> (raw)
In-Reply-To: <20180409120526.66ubl3by4cvaaprq@pathway.suse.cz>

On Mon, 2018-04-09 at 14:05 +0200, Petr Mladek wrote:
> On Sat 2018-04-07 17:08:18, Andy Shevchenko wrote:
> > On Thu, 2018-04-05 at 16:46 +0200, Petr Mladek wrote:
> > > On Thu 2018-04-05 16:04:45, Andy Shevchenko wrote:
> > > > On Wed, 2018-04-04 at 10:58 +0200, Petr Mladek wrote:

> > > > >  /* Maps a pointer to a 32 bit unique identifier. */
> > > > > -static char *ptr_to_id(char *buf, char *end, void *ptr,
> > > > > struct
> > > > > printf_spec spec)
> > > > > +static char *ptr_to_id(char *buf, char *end,
> > > > > +		       const void *ptr, struct printf_spec
> > > > > spec)
> > > > 
> > > > I don't think this change belongs to the patch.
> > > 
> > > The const should have been there from the beginning. I have found
> > > it
> > > because this patch added a call to ptr_to_id() which had the const
> > > and compiler warned about cast problems.
> > 
> > So, why not to do a separate patch with clear intention?
> 
> If you insist I could do it as separate patch.

I believe, that logical changes are easier to review and understand when
it's not mixed with other changes.

> > > IMHO, it is rather cosmetic change.
> > > From my experience I'm afraid of cosmetic changes in the patches
> > > which
> > 
> > might focus out attention on real fix.
> 
> I would understand this if it was part of a large patch that changed
> complex chain of functions. But this patch touched 5 lines. The const
> is added into static function that is almost leaf and was called
> only from a single location.

But it's up to you.

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

  reply	other threads:[~2018-04-09 12:12 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-04  8:58 [PATCH v4 0/9] vsprintf: Prevent silent crashes and consolidate error handling Petr Mladek
2018-04-04  8:58 ` [PATCH v4 1/9] vsprintf: Shuffle ptr_to_id() code Petr Mladek
2018-04-04  8:58 ` [PATCH v4 2/9] vsprintf: Consistent %pK handling for kptr_restrict == 0 Petr Mladek
2018-04-04 23:10   ` Sergey Senozhatsky
2018-04-05 14:34     ` Petr Mladek
2018-04-05 13:04   ` Andy Shevchenko
2018-04-05 14:46     ` Petr Mladek
2018-04-07 14:08       ` Andy Shevchenko
2018-04-09 12:05         ` Petr Mladek
2018-04-09 12:11           ` Andy Shevchenko [this message]
2018-04-04  8:58 ` [PATCH v4 3/9] vsprintf: Do not check address of well-known strings Petr Mladek
2018-04-05 13:30   ` Rasmus Villemoes
2018-04-06  9:15     ` Petr Mladek
2018-04-07 14:12       ` Andy Shevchenko
2018-04-09 12:19         ` Petr Mladek
2018-04-10 10:05           ` Andy Shevchenko
2018-04-04  8:58 ` [PATCH v4 4/9] vsprintf: Consolidate handling of unknown pointer specifiers Petr Mladek
2018-04-05 14:25   ` Rasmus Villemoes
2018-04-05 23:45     ` Joe Perches
2018-04-05 23:55       ` Joe Perches
2018-04-06 11:43         ` Petr Mladek
2018-04-06 13:17           ` Rasmus Villemoes
2018-04-06 14:27             ` Joe Perches
2018-04-09 12:30               ` Petr Mladek
2018-04-07 14:23             ` Andy Shevchenko
2018-04-06 23:52         ` Sergey Senozhatsky
2018-04-06 23:59           ` Joe Perches
2018-04-07  0:33             ` Sergey Senozhatsky
2018-04-07  1:00               ` Joe Perches
2018-04-07  1:17                 ` Sergey Senozhatsky
2018-04-06 11:25     ` Petr Mladek
2018-04-07 14:26   ` Andy Shevchenko
2018-04-09 13:50     ` Petr Mladek
2018-04-10 11:41       ` Andy Shevchenko
2018-04-11  9:52         ` Petr Mladek
2018-04-24 16:47           ` Andy Shevchenko
2018-04-04  8:58 ` [PATCH v4 5/9] vsprintf: Factor out %p[iI] handler as ip_addr_string() Petr Mladek
2018-04-04 23:58   ` Sergey Senozhatsky
2018-04-05 14:14     ` Petr Mladek
2018-04-07 14:30   ` Andy Shevchenko
2018-04-04  8:58 ` [PATCH v4 6/9] vsprintf: Factor out %pV handler as va_format() Petr Mladek
2018-04-04 14:26   ` Joe Perches
2018-04-06 13:12     ` Petr Mladek
2018-04-06 14:19       ` Joe Perches
2018-04-09 11:44         ` Petr Mladek
2018-04-09 11:59           ` Joe Perches
2018-04-04  8:58 ` [PATCH v4 7/9] vsprintf: Factor out %pO handler as kobject_string() Petr Mladek
2018-04-04 23:35   ` Sergey Senozhatsky
2018-04-04 23:43     ` Sergey Senozhatsky
2018-04-05 14:02     ` Petr Mladek
2018-04-04  8:58 ` [PATCH v4 8/9] vsprintf: Prevent crash when dereferencing invalid pointers Petr Mladek
2018-04-05 14:46   ` Rasmus Villemoes
2018-04-06 12:26     ` Petr Mladek
2018-04-06 13:12       ` Rasmus Villemoes
2018-04-10 13:26         ` Petr Mladek
2018-04-06  9:37   ` Rasmus Villemoes
2018-04-04  8:58 ` [PATCH v4 9/9] vsprintf: Avoid confusion between invalid address and value Petr Mladek

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