Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   John Ogness <john.ogness@linutronix.de>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc:     linux-kernel@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>,
        Petr Mladek <pmladek@suse.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrea Parri <andrea.parri@amarulasolutions.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Brendan Higgins <brendanhiggins@google.com>
Subject: Re: [RFC PATCH v4 8/9] printk-rb: new functionality to support printk
References: <20190807222634.1723-1-john.ogness@linutronix.de>
        <20190807222634.1723-9-john.ogness@linutronix.de>
        <20190820095918.GB14137@jagdpanzerIV>
Date:   Wed, 21 Aug 2019 07:47:51 +0200
Message-ID: <8736hvf4s8.fsf@linutronix.de>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 2019-08-20, Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> wrote:
> [..]
>> +void prb_init(struct printk_ringbuffer *rb, char *data, int data_size_bits,
>> +	      struct prb_desc *descs, int desc_count_bits,
>> +	      struct wait_queue_head *waitq)
>> +{
>> +	struct dataring *dr = &rb->dr;
>> +	struct numlist *nl = &rb->nl;
>> +
>> +	rb->desc_count_bits = desc_count_bits;
>> +	rb->descs = descs;
>> +	atomic_long_set(&descs[0].id, 0);
>> +	descs[0].desc.begin_lpos = 1;
>> +	descs[0].desc.next_lpos = 1;
>
> dataring_desc_init(), perhaps?

Agreed.