linux-kernel - Re: printk: what is going on with additional newlines?

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Message-ID: <CA+55aFxs9T4oTs5MR7rcnrBUeUgORXWWNx+T6x52ynqrN38C6Q@mail.gmail.com>
Date:   Tue, 29 Aug 2017 16:59:24 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Pavel Machek <pavel@....cz>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Petr Mladek <pmladek@...e.com>, Jan Kara <jack@...e.cz>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jiri Slaby <jslaby@...e.com>, Andreas Mohr <andi@...as.de>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: printk: what is going on with additional newlines?

On Tue, Aug 29, 2017 at 4:50 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
>
> What about using the seq_buf*() then?

They do have the nice property that because we use them for various
/proc files, there are some helper functions in addition to just the
puts/printt/vprintf.

Ie seq_buf_putmem_hex().

And yeah, you can just do

        char buffer[80];
        struct seq_buf s;

        seq_buf_init(&s, buffer, sizeof(buffer));

if you want to use a stack buffer for a single line.

          Linus