linux-kernel - Re: [PATCH v6 1/3] printk: Add line-buffered printk() API.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 7 Nov 2018 15:06:01 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Dmitriy Vyukov <dvyukov@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Alexander Potapenko <glider@...gle.com>,
        Fengguang Wu <fengguang.wu@...el.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v6 1/3] printk: Add line-buffered printk() API.

On Fri 2018-11-02 22:31:55, Tetsuo Handa wrote:
> How to use this API:
> 
>   (1) Call get_printk_buffer() and acquire "struct printk_buffer *".
> 
>   (2) Rewrite printk() calls in the following way. The "ptr" is
>       "struct printk_buffer *" obtained in step (1).
> 
>       printk(fmt, ...)     => printk_buffered(ptr, fmt, ...)
>       vprintk(fmt, args)   => vprintk_buffered(ptr, fmt, args)
>       pr_emerg(fmt, ...)   => bpr_emerg(ptr, fmt, ...)
>       pr_alert(fmt, ...)   => bpr_alert(ptr, fmt, ...)
>       pr_crit(fmt, ...)    => bpr_crit(ptr, fmt, ...)
>       pr_err(fmt, ...)     => bpr_err(ptr, fmt, ...)
>       pr_warning(fmt, ...) => bpr_warning(ptr, fmt, ...)
>       pr_warn(fmt, ...)    => bpr_warn(ptr, fmt, ...)
>       pr_notice(fmt, ...)  => bpr_notice(ptr, fmt, ...)
>       pr_info(fmt, ...)    => bpr_info(ptr, fmt, ...)
>       pr_cont(fmt, ...)    => bpr_cont(ptr, fmt, ...)

I am looking at the sample conversions. We actually won't need
bpr_cont(). We will use buffer_printk() instead.

Well, I think about renaming buffer_printk() to bprintk() or
define it as a wrapper at least.

Best Regards,
Petr