From patchwork Fri Aug 5 12:12:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 9265331 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E828260760 for ; Fri, 5 Aug 2016 12:13:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D9765283E4 for ; Fri, 5 Aug 2016 12:13:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CE22328400; Fri, 5 Aug 2016 12:13:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 855D2283E4 for ; Fri, 5 Aug 2016 12:13:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752543AbcHEMNI (ORCPT ); Fri, 5 Aug 2016 08:13:08 -0400 Received: from mail-pa0-f65.google.com ([209.85.220.65]:33069 "EHLO mail-pa0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161250AbcHEMNH (ORCPT ); Fri, 5 Aug 2016 08:13:07 -0400 Received: by mail-pa0-f65.google.com with SMTP id vy10so730739pac.0; Fri, 05 Aug 2016 05:13:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=r3beFnfRwLi6HX5T8X/PTEDWwOt33IubTd24qxYrIug=; b=hr61ob+KFslUQZ7P/CxC6NbQtwtQKpS7DiDBocRbLMVzqp5TExciP+JUG8U3sSbFrM WsDqmHqn8TFvZdXDR7JhY2jjXoBPUxNabOJ0T0K1XqHI3of0cglir+0Hp/EOlD/bkmQW nPZ0GJrU75c4tJokJeCvUQQQNh2p4NDKdI6zr4TFH5iv+8b3Bc8d8i99s1hB2tpHi9At 5//OyLYk6TkKiGKcl7m69w6tDI/VbtluHwijNrU9Q/1gcwBkKksk1mfWWMfoEzdBo3ib 6hrlqIbS3nwuMKdAgTNtP3T2zB2rwGfHQO7WnMb9RVlPra0EiFzzRh5+eEcriwzAg+ut V/3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=r3beFnfRwLi6HX5T8X/PTEDWwOt33IubTd24qxYrIug=; b=lhchuael0QytF7tk450KlwwUF6fmTdtO6maAcZyRAHQ4fCfSdXR0fVlkexNrN4xIoS 3CzT0w15qtqgh98kG9DZlnG3+YcS2WbuLlp4kD1PGw58rX6iy/lf+v9yWhp9dV4Xidfk tiEMWu1gcqteH20X/1vQVbYlA5gzVNxK6qDxWWKGxHdmtDu2N/vo4IcJyi7J+7rSgyX0 iQEVRTreNvV6h3B/v5PDNSHrvFTxqWL7mp/0sIiAMQhwb8O2oZ/Dck4h45pfjnqXRE0c ysLf7PQQPZpJQGVxoKk6Xk+JTjHEAa+dN61C1JyRuXvHy0g9NRn8Erv9aHdaff4R1HIE PqvQ== X-Gm-Message-State: AEkoout0YD/WydOuqY3kaKzmZprE95qZdEoL0o5GsgzYwb1cguoiqcC9zvjC9ZSZnbOyyA== X-Received: by 10.66.236.39 with SMTP id ur7mr133808070pac.6.1470399186594; Fri, 05 Aug 2016 05:13:06 -0700 (PDT) Received: from roar.ozlabs.ibm.com ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id m65sm27669685pfg.79.2016.08.05.05.13.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 Aug 2016 05:13:06 -0700 (PDT) From: Nicholas Piggin To: linux-kbuild@vger.kernel.org Cc: Nicholas Piggin , linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Stephen Rothwell , Arnd Bergmann , Nicolas Pitre , Segher Boessenkool , Alan Modra Subject: [PATCH 5/5] powerpc/64: use linker dce Date: Fri, 5 Aug 2016 22:12:03 +1000 Message-Id: <1470399123-8455-6-git-send-email-npiggin@gmail.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1470399123-8455-1-git-send-email-npiggin@gmail.com> References: <1470399123-8455-1-git-send-email-npiggin@gmail.com> Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP --- arch/powerpc/kernel/Makefile | 3 +++ arch/powerpc/kernel/vmlinux.lds.S | 2 +- arch/powerpc/platforms/Kconfig.cputype | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 2da380f..b356e59 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -4,7 +4,10 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' +ccflags-y += -fno-function-sections -fno-data-sections + subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror +subdir-ccflags-y += -fno-function-sections -fno-data-sections ifeq ($(CONFIG_PPC64),y) CFLAGS_prom_init.o += $(NO_MINIMAL_TOC) diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 2dd91f7..c157b8d 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -50,7 +50,7 @@ SECTIONS HEAD_TEXT _text = .; /* careful! __ftr_alt_* sections need to be close to .text */ - *(.text .fixup __ftr_alt_* .ref.text) + *(.text .text.* .fixup __ftr_alt_* .ref.text) SCHED_TEXT LOCK_TEXT KPROBES_TEXT diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 3c77091..6afeb9d 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -3,6 +3,7 @@ config PPC64 default n select HAVE_VIRT_CPU_ACCOUNTING select THIN_ARCHIVES + select LINKER_DCE select ZLIB_DEFLATE help This option selects whether a 32-bit or a 64-bit kernel