From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756839AbZBDQZe (ORCPT ); Wed, 4 Feb 2009 11:25:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752889AbZBDQZY (ORCPT ); Wed, 4 Feb 2009 11:25:24 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:43211 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751942AbZBDQZY (ORCPT ); Wed, 4 Feb 2009 11:25:24 -0500 Date: Wed, 4 Feb 2009 08:24:58 -0800 (PST) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: "Rafael J. Wysocki" cc: Norbert Preining , Linux Kernel Mailing List , Jens Axboe , Hiroshi Shimamoto , Ingo Molnar Subject: Re: 2.6.29-rc3-git6: Reported regressions from 2.6.28 In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 4 Feb 2009, Rafael J. Wysocki wrote: > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12599 > Subject : dri /dev node disappeared with 2.6.29-rc1 > Submitter : Norbert Preining > Date : 2009-01-15 13:42 (21 days old) > References : http://marc.info/?l=linux-kernel&m=123202701026647&w=4 I think this one is simply that Intel DRI now requires CONFIG_FB. So make sure that you say yes to the CONFIG_FB question (easiest fix: just edit the .config file and change the line "# CONFIG_FB is not set" to "CONFIG_FB=y" and do "make oldconfig" - I realize that people think that graphical config front-ends are simpler, but often just editing the file is the quickest way). > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12591 > Subject : NULL pointer dereference in blk_queue_io_stat > Submitter : Petr Vandrovec > Date : 2009-01-31 23:58 (5 days old) > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bc58ba9468d94d62c56ab9b47173583ec140b165 > Handled-By : Jens Axboe I think this one is fixed by commit fb8ec18c316d8. > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12511 > Subject : WARNING: at drivers/dma/dmaengine.c:352 > Submitter : Ingo Molnar > Date : 2009-01-19 21:31 (17 days old) > References : http://marc.info/?l=linux-kernel&m=123240070614443&w=4 > Handled-By : Dan Williams This warning just got removed as bogus. Commit 83436a0560e9ef8af2f0796264dde4bed1415359 > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12506 > Subject : Undefined symbols when CONFIG_MFD_PCF50633 is enabled > Submitter : Ozan Çağlayan > Date : 2009-01-17 10:56 (19 days old) > References : http://marc.info/?l=linux-kernel&m=123218991104592&w=4 Commit 9e6f8ed7c3a303d37eb119847dd3029701e37e28 > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12505 > Subject : 2.6.29-rc1 Firefox crashing on page load > Submitter : Justin Madru > Date : 2009-01-16 20:56 (20 days old) > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4217458dafaa57d8e26a46f5d05ab8c53cf64191 > References : http://marc.info/?l=linux-kernel&m=123213941914274&w=4 > Handled-By : Justin P. Mattock Heh. That commit you point to is very innocuous. Commit 4217458dafaa57d8e26a46f5d05ab8c53cf64191 is a pure cleanup, and it _does_ make the code look nicer, but while it looks lik a total no-op, it actually has a very subtle behavioural change: it makes gcc think that it owns the whole argument stack. Which is _not_ true of 'asmlinkage' functions, but we've never been able to tell gcc to keep its grubby hands off our stack. So I suspect that gcc inlines the function and then creates a function call that re-uses the "struct pt_regs" on the stack as the argument area too. Which corrupts the "pt_regs", and then we return to user space with some random register contents. So I think we need to just revert it. Ingo, Hiroshi? Linus