From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UEGyW-00067F-Bl for barebox@lists.infradead.org; Sat, 09 Mar 2013 10:26:01 +0000 Date: Sat, 9 Mar 2013 11:25:58 +0100 From: Sascha Hauer Message-ID: <20130309102558.GJ1906@pengutronix.de> References: <20130307215402.GA32347@game.jcrosoft.org> <1362743983-11462-1-git-send-email-plagnioj@jcrosoft.com> <1362743983-11462-3-git-send-email-plagnioj@jcrosoft.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1362743983-11462-3-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 03/11] intoduce dmesg to print the barebox printk to dmesg ring buffer To: Jean-Christophe PLAGNIOL-VILLARD Cc: barebox@lists.infradead.org On Fri, Mar 08, 2013 at 12:59:35PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > the size can be configured vai DMESG_KFIFO_OSIZE > > +int vprintk(const char *fmt, va_list args) > +{ > + uint i, fi; > + char printbuffer[CFG_PBSIZE]; > + char *s = printbuffer; > + int level; > + > + /* For this to work, printbuffer must be larger than > + * anything we ever want to print. > + */ > + fi = i = vsprintf(printbuffer, fmt, args); > + > + level = printk_get_level(printbuffer); > + if (level) { > + s += 2; > + fi -= 2; > + kfifo_putc(dmesg_output_fifo, '<'); > + kfifo_putc(dmesg_output_fifo, level); > + kfifo_putc(dmesg_output_fifo, '>'); > + } > + > + /* Print the string */ > + if (level <= printk_level + '0') > + puts(s); > + > + kfifo_put(dmesg_output_fifo, s, fi); When the buffer is full this drops the current message instead of the oldest. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox