linux-kernel - Re: [PATCH 1/3] staging: vt6655: fix DBG_PRT and PRINT

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Date:	Tue, 1 Apr 2014 17:02:54 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Guido Martínez <guido@...guardiasur.com.ar>
Cc:	linux-kernel@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
	driverdev-devel@...uxdriverproject.org,
	Ezequiel García 
	<ezequiel@...guardiasur.com.ar>,
	Walter Lozano <walter@...guardiasur.com.ar>,
	Forest Bond <forest@...ttletooquiet.net>
Subject: Re: [PATCH 1/3] staging: vt6655: fix DBG_PRT and PRINT_K macros

On Tue, Apr 01, 2014 at 09:52:11AM -0300, Guido Martínez wrote:
> Parenthesize both macros so they will not break program logic if used
> within another 'if'. Also fix a usage of DBG_PRT with a missing
> semicolon.
> 
> Signed-off-by: Guido Martínez <guido@...guardiasur.com.ar>
> ---
>  drivers/staging/vt6655/device.h | 4 ++--
>  drivers/staging/vt6655/wpactl.c | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/vt6655/device.h b/drivers/staging/vt6655/device.h
> index 062c3a3..483b017 100644
> --- a/drivers/staging/vt6655/device.h
> +++ b/drivers/staging/vt6655/device.h
> @@ -148,8 +148,8 @@
>  
>  /*---------------------  Export Types  ------------------------------*/
>  
> -#define DBG_PRT(l, p, args...) { if (l <= msglevel) printk(p, ##args); }
> -#define PRINT_K(p, args...) { if (PRIVATE_Message) printk(p, ##args); }
> +#define DBG_PRT(l, p, args...) ({ if (l <= msglevel) printk(p, ##args); })
> +#define PRINT_K(p, args...) ({ if (PRIVATE_Message) printk(p, ##args); })

Use a do { } while(0) for this.

regards,
dan carpenter


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