linux-kernel - Re: [PATCH v1 1/1] powerpc/prom_init: Move custom isspace() to its own namespace

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Date:   Mon, 7 Jun 2021 20:12:59 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v1 1/1] powerpc/prom_init: Move custom isspace() to its
 own namespace

On Mon, May 10, 2021 at 05:49:25PM +0300, Andy Shevchenko wrote:
> If by some reason any of the headers will include ctype.h
> we will have a name collision. Avoid this by moving isspace()
> to the dedicate namespace.
> 
> First appearance of the code is in the commit cf68787b68a2
> ("powerpc/prom_init: Evaluate mem kernel parameter for early allocation").

Any comments on this?

> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  arch/powerpc/kernel/prom_init.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
> index 41ed7e33d897..6845cbbc0cd4 100644
> --- a/arch/powerpc/kernel/prom_init.c
> +++ b/arch/powerpc/kernel/prom_init.c
> @@ -701,13 +701,13 @@ static int __init prom_setprop(phandle node, const char *nodename,
>  }
>  
>  /* We can't use the standard versions because of relocation headaches. */
> -#define isxdigit(c)	(('0' <= (c) && (c) <= '9') \
> -			 || ('a' <= (c) && (c) <= 'f') \
> -			 || ('A' <= (c) && (c) <= 'F'))
> +#define prom_isxdigit(c)	(('0' <= (c) && (c) <= '9') \
> +				 || ('a' <= (c) && (c) <= 'f') \
> +				 || ('A' <= (c) && (c) <= 'F'))
>  
> -#define isdigit(c)	('0' <= (c) && (c) <= '9')
> -#define islower(c)	('a' <= (c) && (c) <= 'z')
> -#define toupper(c)	(islower(c) ? ((c) - 'a' + 'A') : (c))
> +#define prom_isdigit(c)		('0' <= (c) && (c) <= '9')
> +#define prom_islower(c)		('a' <= (c) && (c) <= 'z')
> +#define prom_toupper(c)		(prom_islower(c) ? ((c) - 'a' + 'A') : (c))
>  
>  static unsigned long prom_strtoul(const char *cp, const char **endp)
>  {
> @@ -716,14 +716,14 @@ static unsigned long prom_strtoul(const char *cp, const char **endp)
>  	if (*cp == '0') {
>  		base = 8;
>  		cp++;
> -		if (toupper(*cp) == 'X') {
> +		if (prom_toupper(*cp) == 'X') {
>  			cp++;
>  			base = 16;
>  		}
>  	}
>  
> -	while (isxdigit(*cp) &&
> -	       (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
> +	while (prom_isxdigit(*cp) &&
> +	       (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
>  		result = result * base + value;
>  		cp++;
>  	}
> -- 
> 2.30.2
> 

-- 
With Best Regards,
Andy Shevchenko