From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <arnd@arndb.de>
Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.187])
 (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (No client certificate requested)
 by lists.ozlabs.org (Postfix) with ESMTPS id 3s6sWq3CN9zDqYw
 for <linuxppc-dev@lists.ozlabs.org>; Mon,  8 Aug 2016 06:26:31 +1000 (AEST)
From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@lists.ozlabs.org
Cc: Alan Modra <amodra@gmail.com>, Nicholas Piggin <npiggin@gmail.com>,
 linux-arch@vger.kernel.org, Stephen Rothwell <sfr@canb.auug.org.au>,
 Nicolas Pitre <nico@linaro.org>, linux-kbuild@vger.kernel.org
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-Type: text/plain; charset="us-ascii"
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>

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