linux-kernel - Re: [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr

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Date:	Mon, 15 Feb 2016 21:55:17 -0800
From:	Joe Perches <joe@...ches.com>
To:	green@...uxhacker.ru,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lustre Development List <lustre-devel@...ts.lustre.org>
Subject: Re: [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with
 pr_<level>

On Tue, 2016-02-16 at 00:47 -0500, green@...uxhacker.ru wrote:
> From: Oleg Drokin <green@...uxhacker.ru>
> 
> This pacifies checkpatch amongst other things, also is shorter to write
> and avoiding calls to printk_ratelimit() is also good.
[]
> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
[]
> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
>  	}
>  
>  	if ((mask & D_CONSOLE) != 0) {
> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
>  	} else {
> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> -		       fn, len, buf);
> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> +			fn, len, buf);
>  	}
>  }

This breaks the currently correct output.

ptype is already a KERN_<LEVEL>

	char *prefix = "Lustre", *ptype = NULL;

	if ((mask & D_EMERG) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_EMERG;
	} else if ((mask & D_ERROR) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_ERR;
	} else if ((mask & D_WARNING) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_WARNING;
	} else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_INFO;
	}