Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751006AbaGBHQ0 (ORCPT ); Wed, 2 Jul 2014 03:16:26 -0400 Received: from mail7.hitachi.co.jp ([133.145.228.42]:35131 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750757AbaGBHQX (ORCPT ); Wed, 2 Jul 2014 03:16:23 -0400 Message-ID: <53B3B1BF.2040404@hitachi.com> Date: Wed, 02 Jul 2014 16:16:15 +0900 From: Masami Hiramatsu Organization: Hitachi, Ltd., Japan User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: Michael Ellerman Cc: Benjamin Herrenschmidt , Paul Mackerras , Tony Luck , Jeremy Fitzhardinge , linux-ia64@vger.kernel.org, sparse@chrisli.org, "H. Peter Anvin" , Ingo Molnar , linux-tip-commits@vger.kernel.org, akataria@vmware.com, anil.s.keshavamurthy@intel.com, "Suzuki K. Poulose" , Fenghua Yu , Arnd Bergmann , Rusty Russell , Chris Wright , yrl.pp-manager.tt@hitachi.com, Thomas Gleixner , Tony Luck , Kevin Hao , Ananth N Mavinakayanahalli , linuxppc-dev@lists.ozlabs.org, rdunlap@infradead.org, Linux Kernel Mailing List , dl9pf@gmx.de, Andrew Morton , Linus Torvalds , "David S. Miller" Subject: Re: Re: Re: Re: [PATCH v4] [BUGFIX] kprobes: Fix "Failed to find blacklist" error on ia64 and ppc64 References: <20140620022307.23075.55858.stgit@kbuild-fedora.novalocal> <53B0D61B.9010104@hitachi.com> <1404128176.7888.1.camel@concordia> <53B21B0E.8010707@hitachi.com> <1404276081.7254.1.camel@concordia> <53B3A91D.2040107@hitachi.com> <1404284165.7254.2.camel@concordia> In-Reply-To: <1404284165.7254.2.camel@concordia> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (2014/07/02 15:56), Michael Ellerman wrote: > On Wed, 2014-07-02 at 15:39 +0900, Masami Hiramatsu wrote: >> (2014/07/02 13:41), Michael Ellerman wrote: >>> On Tue, 2014-07-01 at 11:21 +0900, Masami Hiramatsu wrote: >>>> (2014/06/30 20:36), Michael Ellerman wrote: >>>>> On Mon, 2014-06-30 at 12:14 +0900, Masami Hiramatsu wrote: >>>>>> Ping? :) >>>>> >>>>> Yeah sorry. I started looking at this and got dragged into another mess. >>>>> >>>>> You seem to have duplicated the functionality of arch_deref_entry_point(), >>>>> which was also added for kprobes, and for the same reason - ie. because some >>>>> arches have strange function pointers. Is there some reason you can't use it? >>>> >>>> Ah, right! Hmm, it seems some more work to update it. but basically, we can do. >>>> BTW, is there any other users who need to access the actual function entry (for >>>> kallsyms case)? >>> >>> Not that I'm aware of. We have had function descriptors on 64-bit powerpc for >>> ever, so in theory by now we should have already found any cases where we need >>> that sort of wrapper. >> >> OK, then I'll update this patch to use arch_deref_entry_point(), and add additional >> patch which update to support PPC64 ABIv2. > > I've already done the latter: > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f0143c91d30823f6f6e7d94d7fa818f7ab18a18 Oh, thanks! In that case, my 1/2 patch should be dropped. -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com -- 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/