linux-kernel - Re: [PATCH] printk: Remove no longer used LOG

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Message-ID: <b830aae9-766f-54d2-840b-f70da3d1215d@i-love.sakura.ne.jp>
Date:   Fri, 1 Mar 2019 19:31:59 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Remove no longer used LOG_PREFIX.

Can this patch go to Linux 5.1?

On 2019/02/22 18:59, Tetsuo Handa wrote:
> When commit 5becfb1df5ac8e49 ("kmsg: merge continuation records while
> printing") introduced LOG_PREFIX, we used KERN_DEFAULT etc. as a flag
> for setting LOG_PREFIX in order to tell whether to call cont_add()
> (i.e. whether to append the message to "struct cont").
> 
> But since commit 4bcc595ccd80decb ("printk: reinstate KERN_CONT for
> printing continuation lines") inverted the behavior (i.e. don't append
> the message to "struct cont" unless KERN_CONT is specified) and commit
> 5aa068ea4082b39e ("printk: remove games with previous record flags")
> removed the last LOG_PREFIX check, setting LOG_PREFIX via KERN_DEFAULT
> etc. is no longer meaningful.
> 
> Therefore, we can remove LOG_PREFIX and make KERN_DEFAULT empty string.
> 
> Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> ---
>  include/linux/kern_levels.h | 2 +-
>  include/linux/printk.h      | 1 -
>  kernel/printk/printk.c      | 6 +-----
>  3 files changed, 2 insertions(+), 7 deletions(-)