linux-kernel - Re: [PATCH v5 02/11] vsprintf: Add missing const ptr qualifier to prt_to

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Date:   Wed, 25 Apr 2018 17:57:28 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "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 v5 02/11] vsprintf: Add missing const ptr qualifier to
 prt_to_id()

On Wed, 2018-04-25 at 13:12 +0200, Petr Mladek wrote:
> vsprintf() must not change any data that parameters point to.
> Let's add the missing const qualifier to ptr_to_id().
> 
> This patch does not change the existing behavior.
> 

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Signed-off-by: Petr Mladek <pmladek@...e.com>
> ---
>  lib/vsprintf.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/vsprintf.c b/lib/vsprintf.c
> index 19fdfe621b40..eef9f725e9ff 100644
> --- a/lib/vsprintf.c
> +++ b/lib/vsprintf.c
> @@ -661,7 +661,8 @@ static int __init initialize_ptr_random(void)
>  early_initcall(initialize_ptr_random);
>  
>  /* 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)
>  {
>  	const char *str = sizeof(ptr) == 8 ? "(____ptrval____)" :
> "(ptrval)";
>  	unsigned long hashval;

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