linux-kernel - Re: [PATCH] printk: Modify operators of printed

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Date:   Fri, 07 Jul 2017 10:12:33 -0700
From:   Joe Perches <joe@...ches.com>
To:     Pierre Kuo <vichy.kuo@...il.com>, pmladek@...e.com
Cc:     sergey.senozhatsky@...il.com, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Modify operators of printed_len

On Sat, 2017-07-08 at 00:30 +0800, Pierre Kuo wrote:
> In 8b1742c9c207, we remove printk-recursion detection code in
> vprintk_emit(), where it is the first place that printed_len calculated.
> After removing above detection, it seems we can directly assign the
> result of log_output to printed_len.
[]
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
[]
> @@ -1754,7 +1754,7 @@ asmlinkage int vprintk_emit(int facility, int level,
>  	if (dict)
>  		lflags |= LOG_PREFIX|LOG_NEWLINE;
>  
> -	printed_len += log_output(facility, level, lflags, dict, dictlen, text, text_len);
> +	printed_len = log_output(facility, level, lflags, dict, dictlen, text, text_len);

If this is appropriate, this should also remove the
initialization of printed_len and perhaps rename it too.