Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755288Ab0HCJGW (ORCPT ); Tue, 3 Aug 2010 05:06:22 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:49538 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754106Ab0HCJGV (ORCPT ); Tue, 3 Aug 2010 05:06:21 -0400 Date: Tue, 3 Aug 2010 02:06:38 -0700 From: Andrew Morton To: Yinghai Lu Cc: "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner , Cyrill Gorcunov , Pekka Enberg , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH -v3] x86: Setup early console as early as possible Message-Id: <20100803020638.4e2177c3.akpm@linux-foundation.org> In-Reply-To: <4C57C1DE.9050400@kernel.org> References: <4C56701B.1030000@kernel.org> <20100802150958.GA5544@lenovo> <4C571B25.3080806@kernel.org> <20100802201750.GG5544@lenovo> <4C57C1DE.9050400@kernel.org> X-Mailer: Sylpheed 2.7.1 (GTK+ 2.18.9; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1290 Lines: 34 On Tue, 03 Aug 2010 00:14:38 -0700 Yinghai Lu wrote: > > Analyze "console=uart8250,io,0x3f8,115200n8" in i386_start_kernel/x86_64_start_kernel, > and call setup_early_serial8250_console() to init early serial console. > > only can handle io port kind of 8250. because mmio need ioremap. > > -v2: use boot_params.hdr.version instead of adding another variable, Suggested by hpa > update after using x86 memblock patchset > -v3: x86 memblock can not make into with 2.6.36 now > so update this patch to be applied before x86 memblock patchset again. > > ... > > --- linux-2.6.orig/kernel/printk.c > +++ linux-2.6/kernel/printk.c > @@ -1203,6 +1203,10 @@ void register_console(struct console *ne > if (console_drivers && newcon->flags & CON_BOOT) { > /* find the last or real console */ > for_each_console(bcon) { > + /* not again */ > + if (bcon == newcon) > + return; > + > if (!(bcon->flags & CON_BOOT)) { > printk(KERN_INFO "Too late to register bootconsole %s%d\n", Why this change? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/