Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754161AbbKGSQ7 (ORCPT ); Sat, 7 Nov 2015 13:16:59 -0500 Received: from mail-ob0-f176.google.com ([209.85.214.176]:33605 "EHLO mail-ob0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753938AbbKGSQ6 (ORCPT ); Sat, 7 Nov 2015 13:16:58 -0500 MIME-Version: 1.0 In-Reply-To: References: <42b51cafe425b8d7d177c7c363235df0ace22692.1446849780.git.luto@kernel.org> From: Andy Lutomirski Date: Sat, 7 Nov 2015 10:16:37 -0800 Message-ID: Subject: Re: [PATCH 3/4] x86/asm: Add asm macros for static keys/jump labels To: Thomas Gleixner Cc: Borislav Petkov , Frederic Weisbecker , Brian Gerst , "linux-kernel@vger.kernel.org" , X86 ML , Peter Zijlstra , Linus Torvalds Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1062 Lines: 24 On Sat, Nov 7, 2015 at 9:08 AM, Thomas Gleixner wrote: > On Sat, 7 Nov 2015, Andy Lutomirski wrote: >> On Sat, Nov 7, 2015 at 8:58 AM, Thomas Gleixner wrote: >> True. But I hid it in a header file, too, but it was just a different >> header file -- I had it all hidden away as CALL_ENTER_FROM_USER_MODE. > > It probably does not really make a difference :) > > I just got triggered by you saying: > >> Unfortunately, these only work if HAVE_JUMP_LABEL .... Yeah, I don't really like that either. I think that the real fix would be to compile in the runtime jump label bits unconditionally. Admittedly it would bloat the kernel image a little bit for !CONFIG_JUMP_LABEL or if build with an older gcc, and that's even less appropriate for 4.4 at this point. Peter? --Andy -- 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/