From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de ([212.227.126.187]:61893 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750715AbcHGU00 (ORCPT ); Sun, 7 Aug 2016 16:26:26 -0400 From: Arnd Bergmann Subject: Re: [PATCH 2/5] kbuild: allow archs to select build for link dead code/data elimination Date: Sun, 07 Aug 2016 22:26:19 +0200 Message-ID: <12986071.MeSB5hmlsH@wuerfel> In-Reply-To: <20160807095739.GU20904@bubble.grove.modra.org> References: <1470399123-8455-1-git-send-email-npiggin@gmail.com> <1470399123-8455-3-git-send-email-npiggin@gmail.com> <20160807095739.GU20904@bubble.grove.modra.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: linuxppc-dev@lists.ozlabs.org Cc: Alan Modra , Nicholas Piggin , linux-arch@vger.kernel.org, Stephen Rothwell , Nicolas Pitre , linux-kbuild@vger.kernel.org On Sunday, August 7, 2016 7:27:39 PM CEST Alan Modra wrote: > > If it can, then Nicholas' patch should be: > > *(.text.hot .text.hot.*) *(.text.unlikely .text.unlikely.*) *(.text .text.*) > > If you can't put .text.fixup too far away then you may as well just use > > *(.text .text.*) I tried this version: diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index b1f8828e9eac..fc210dacac9a 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -438,7 +438,9 @@ * during second ld run in second ld pass when generating System.map */ #define TEXT_TEXT \ ALIGN_FUNCTION(); \ - *(.text.hot .text .text.fixup .text.unlikely .text.*) \ + *(.text.hot .text.hot.*) \ + *(.text.unlikely .text.fixup .text.unlikely.*) \ + *(.text .text.*) \ *(.ref.text) \ MEM_KEEP(init.text) \ MEM_KEEP(exit.text) \ but that failed to link an allyesconfig kernel because of references from .fixup to .text.*. Trying your version now: *(.text.hot .text.hot.*) *(.text.unlikely .text.unlikely.*) *(.text .text.*) Arnd