Re: [PATCH v2] powerpc/mm/radix: use do/while(0) trick for single statement block

[Randy Dunlap <rdunlap@infradead.org>]

On 04/23/18 12:36, Mathieu Malaterre wrote:
> In commit 7a22d6321c3d ("powerpc/mm/radix: Update command line parsing for
> disable_radix") an `if` statement was added for a possible empty body
> (prom_debug).
> 
> Fix the following warning, treated as error with W=1:
> 
>   arch/powerpc/kernel/prom_init.c:656:46: error: suggest braces around empty body in an ‘if’ statement [-Werror=empty-body]
> 
> Suggested-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Mathieu Malaterre <malat@debian.org>

Acked-by: Randy Dunlap <rdunlap@infradead.org>

Thanks.

> ---
> v2: update macro directly
> 
>  arch/powerpc/kernel/prom_init.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
> index 5ae153b97d0a..7edf3aa5bc6d 100644
> --- a/arch/powerpc/kernel/prom_init.c
> +++ b/arch/powerpc/kernel/prom_init.c
> @@ -103,7 +103,7 @@ int of_workarounds;
>  #ifdef DEBUG_PROM
>  #define prom_debug(x...)	prom_printf(x)
>  #else
> -#define prom_debug(x...)
> +#define prom_debug(x...)	do { } while (0)
>  #endif
>  
>  
> 


-- 
~Randy