linux-kernel - Re: [PATCH v2 2/3] lib/vsprintf: Replace custom spec to print decimals with generic one

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Date:   Fri, 31 Jul 2020 11:20:21 -0700
From:   Joe Perches <joe@...ches.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        linux-kernel@...r.kernel.org,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Rob Herring <robh@...nel.org>,
        Grant Likely <grant.likely@....com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH v2 2/3] lib/vsprintf: Replace custom spec to print
 decimals with generic one

On Fri, 2020-07-31 at 21:08 +0300, Andy Shevchenko wrote:
> When printing phandle via %pOFp the custom spec is used. First of all,
> it has a SMALL flag which makes no sense for decimal numbers. Second,
> we have already default spec for decimal numbers. Use the latter in
> the %pOFp case as well.
[]
> diff --git a/lib/vsprintf.c b/lib/vsprintf.c
[]
> @@ -1979,12 +1979,6 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
>  	char *buf_start = buf;
>  	struct property *prop;
>  	bool has_mult, pass;
> -	static const struct printf_spec num_spec = {
> -		.flags = SMALL,
> -		.field_width = -1,
> -		.precision = -1,
> -		.base = 10,
> -	};
>  
>  	struct printf_spec str_spec = spec;
>  	str_spec.field_width = -1;
> @@ -2024,7 +2018,7 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
>  			str_spec.precision = precision;
>  			break;
>  		case 'p':	/* phandle */
> -			buf = number(buf, end, (unsigned int)dn->phandle, num_spec);
> +			buf = number(buf, end, (unsigned int)dn->phandle, default_dec_spec);

Could changing .precision = -1 to 0 change any output?