linux-kernel - Re: [PATCH printk-rework 09/14] printk: introduce a kmsg

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Message-ID: <YC/fvJbl0mJdm/VH@alley>
Date:   Fri, 19 Feb 2021 16:56:44 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH printk-rework 09/14] printk: introduce a kmsg_dump
 iterator

On Thu 2021-02-18 09:18:12, John Ogness wrote:
> Rather than store the iterator information into the registered

s/store/storing/ ?

> kmsg_dump structure, create a separate iterator structure. The
> kmsg_dump_iter structure can reside on the stack of the caller,
> thus allowing lockless use of the kmsg_dump functions.
> 
> This is in preparation for removal of @logbuf_lock.
> 
> diff --git a/include/linux/kmsg_dump.h b/include/linux/kmsg_dump.h
> index 4095a34db0fa..2fdb10ab1799 100644
> --- a/include/linux/kmsg_dump.h
> +++ b/include/linux/kmsg_dump.h
> @@ -29,6 +29,18 @@ enum kmsg_dump_reason {
>  	KMSG_DUMP_MAX
>  };
>  
> +/**
> + * struct kmsg_dumper_iter - iterator for kernel crash message dumper
> + * @active:	Flag that specifies if this is currently dumping
> + * @cur_seq:	Points to the oldest message to dump (private)
> + * @next_seq:	Points after the newest message to dump (private)

"(private)" might be removed.

Anyway, the issues are only cosmetic:

Reviewed-by: Petr Mladek <pmladek@...e.com>

Best Regards,
Petr