linux-kernel - Re: [PATCH v2] xen-scsiback: use DRV

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Date:	Wed, 04 Mar 2015 08:32:19 -0800
From:	Joe Perches <joe@...ches.com>
To:	Tao Chen <boby.chen@...wei.com>
Cc:	jgross@...e.com, konrad.wilk@...cle.com,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	xen-devel@...ts.xenproject.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, wu.wubin@...wei.com,
	rudy.zhangmin@...wei.com
Subject: Re: [PATCH v2] xen-scsiback: use DRV_PFX in the pr macros and
 DPRINTK

On Wed, 2015-03-04 at 18:32 +0000, Tao Chen wrote:
> Defined the string of {xen-pvscsi: } as DRV_PFX, then use it in the pr sentences and DPRINTK.
> Also fixed up some comments just as eliminate redundant white spaces and format the code.
> These will make the code easier to read.

It'd probaby be better just to use pr_fmt
before any include and remove all the DRV_PRV uses

#define pr_fmt(fmt) "xen-pvscsi: " fmt

> diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
[]
> @@ -69,8 +69,10 @@
>  #include <xen/interface/grant_table.h>
>  #include <xen/interface/io/vscsiif.h>
>  
> +#define DRV_PFX "xen-pvscsi: "
>  #define DPRINTK(_f, _a...)			\
> -	pr_debug("(file=%s, line=%d) " _f, __FILE__ , __LINE__ , ## _a)
> +	pr_debug(DRV_PFX "(file=%s, line=%d) " _f,	\
> +			__FILE__ , __LINE__ , ## _a)

I'd also remove DPRINTK and just use pr_debug directly
as dynamic_debug can emit file and line as desired.

> @@ -84,7 +86,7 @@ struct ids_tuple {
>  
>  struct v2p_entry {
>  	struct ids_tuple v;		/* translate from */
> -	struct scsiback_tpg *tpg;	/* translate to   */
> +	struct scsiback_tpg *tpg;	/* translate to */

superfluous change.


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