From patchwork Tue Aug 20 17:09:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 1150309 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=socionext.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DUKWQzQJ"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=nifty.com header.i=@nifty.com header.b="CeHhXalJ"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46Cck20mV7z9s4Y for ; Wed, 21 Aug 2019 03:10:18 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=OkXOTP/sdKSdpNrzEUe0EhpYYWE7Kd2yKYBbCKzuvrw=; b=DUK WQzQJGYg6lEdsxnQg3tUjVm5ZfRi2Mx4F5tpkfErXhDtzyRPXa8KIoGUqGeF42IfHV8AeJn7zUOhz 3WBWm13agKSMW00uI0OLweQwx2qG8oO1Jy+WoPLPeHATwptKteqlPBGhdr9zLJYa/Da6xSth5ZvmR brxpYVWvBCBJGq1b1NnIj3SOvg4aXHSBaKzJ1xsTX+bN/SdzlMm5JCeAvrsJkX7pXkAj3pUZQVphQ MVH8Xv7KSOK/xVnBGnS9Z1QFsI/1VgpVJxly5SUCi9inlMsr+zk0uC1H1U0YMQyRwsRkxhXG7JCAe 4eYf6vY4fopVZm+74lym8JOR4NW9jLw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i07eC-0007CP-3z; Tue, 20 Aug 2019 17:10:16 +0000 Received: from conuserg-12.nifty.com ([210.131.2.79]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i07e9-00072X-QI for linux-snps-arc@lists.infradead.org; Tue, 20 Aug 2019 17:10:15 +0000 Received: from grover.flets-west.jp (softbank126125143222.bbtec.net [126.125.143.222]) (authenticated) by conuserg-12.nifty.com with ESMTP id x7KH9n49020646; Wed, 21 Aug 2019 02:09:49 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-12.nifty.com x7KH9n49020646 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1566320990; bh=NX+Y5RmE+GMCx3VPH/N13pbHW6+fZL4TprkkbxCZzTA=; h=From:To:Cc:Subject:Date:From; b=CeHhXalJuSQA8t5jvXhsUEcBno1LH0g/7/wBeHXqHemLSXlyo+TOq1pHDHA+MpYiD UK1RCeZBWi2T/yGyaZYs1+p3f9GPKzxixFlYjDfsueoUVzUZwx1OrL/6X2s8+o5JTa WF51kTWXfKc6vUW0dpZZkQ9f3dmFlTGUUGfYPQmWcQ8iJKOHnLYWaeE5MkDH0n3a8j 6ZbZ4eehAf1UpFsiBhgUy63edhVCWz1zuGwurdZ52Z0GVnnTYIEmbDjpBNLgAq2Ztk lGXEUjn270PiEuE1onY/yluLSbUB0bDEjd26H6ChvB3GyLE+1h8L2NEMWYUCZmXaYe t1J9YxjWEICjA== X-Nifty-SrcIP: [126.125.143.222] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Subject: [PATCH 1/3] init/Kconfig: rework help of CONFIG_CC_OPTIMIZE_FOR_SIZE Date: Wed, 21 Aug 2019 02:09:39 +0900 Message-Id: <20190820170941.26193-1-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190820_101014_158920_077F9A7B X-CRM114-Status: UNSURE ( 6.57 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [210.131.2.79 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vineet Gupta , linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann , Masahiro Yamada MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org CONFIG_CC_OPTIMIZE_FOR_SIZE was originally an independent boolean option, but commit 877417e6ffb9 ("Kbuild: change CC_OPTIMIZE_FOR_SIZE definition") turned it into a choice between _PERFORMANCE and _SIZE. The phrase "If unsure, say N." sounds like an independent option. Reword the help text to make it appropriate for the choice menu. Signed-off-by: Masahiro Yamada --- init/Kconfig | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index bf971b5c707d..149efd82447f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1219,10 +1219,8 @@ config CC_OPTIMIZE_FOR_SIZE bool "Optimize for size" imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives help - Enabling this option will pass "-Os" instead of "-O2" to - your compiler resulting in a smaller kernel. - - If unsure, say N. + Choosing this option will pass "-Os" to your compiler resulting + in a smaller kernel. endchoice From patchwork Tue Aug 20 17:09:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 1150311 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=socionext.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Xdm5zhk9"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=nifty.com header.i=@nifty.com header.b="MC+dTlnB"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46Cck43Tfyz9sDQ for ; Wed, 21 Aug 2019 03:10:20 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ew3jmYu3Y6IExaSejnqIdOvF/w2t5zXTT1//eYf6mxg=; b=Xdm5zhk9wpzodKqOMUp3ys3OEq JomJPJSkIHPJQp2ZQT2WW5vofBwAetNL9Mk8dWS2y5d25GcwKzuBCkOgMB2zfrs4Az3g2Qq7Ylkwb voDCx+VUL3J7q4/f681kuGOBKvU+iPo5JH6MdDRacXRmiqT0pmDLz3q4kDlLpXACqEQp8AWFZ4T07 bfdbtGY4/Jb+kFPuqNH2gEkaGUJ481Qu6mvSHjyxxjXR+pkgv1A/w9OXwPoyORd6xNE5yDGIiVa7o QxLiA2ql0fgSoWxI76y6Qlbo4R4GNR3umq3pM0IyT+lh6bFl2Fl/pPoAox3zeTtkN6Rkwz+/+nWjf h4ghMlJw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i07eE-0007DJ-I7; Tue, 20 Aug 2019 17:10:18 +0000 Received: from conuserg-12.nifty.com ([210.131.2.79]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i07e9-000746-Ol for linux-snps-arc@lists.infradead.org; Tue, 20 Aug 2019 17:10:17 +0000 Received: from grover.flets-west.jp (softbank126125143222.bbtec.net [126.125.143.222]) (authenticated) by conuserg-12.nifty.com with ESMTP id x7KH9n4A020646; Wed, 21 Aug 2019 02:09:50 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-12.nifty.com x7KH9n4A020646 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1566320990; bh=MhRL2L16fztVkjRl7Dbo62IDoHqnAt4Kqk+KWGQiEwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MC+dTlnB91G1nlsV+nNw9kjYiWH3I/Psi6/69xo13mtLv3WeR2+/FNQfUY6/pNr+R 3JNgwAWdhLaij6X/z7Yg+AeFmjQKPTgmWWQA3C5hjXqb2SNdFDU3TxHkIlr/Baw1Ja HG3MRze8tx50q9jWya18/3JMlsUSPabsyNrs4sVFEb5RmngqQlmh+7o1ZDXHpAb2u1 K8S9PUP8zo33UEUlZveFn7fUe5RcG3BIYI/UpngbJMBBmDVoT5L0X2cG8wD9wSC2DX lJD8lRg9yTnQhf545SQSCCVkb4qE5sFTYgE/KK0sGaER/nH2fIZzf9U8RxIWvUfQnL VADgy8qHx2H9Q== X-Nifty-SrcIP: [126.125.143.222] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Subject: [PATCH 2/3] kbuild, arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC Date: Wed, 21 Aug 2019 02:09:40 +0900 Message-Id: <20190820170941.26193-2-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190820170941.26193-1-yamada.masahiro@socionext.com> References: <20190820170941.26193-1-yamada.masahiro@socionext.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190820_101014_143925_8E4B887B X-CRM114-Status: UNSURE ( 9.95 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [210.131.2.79 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Marek , Arnd Bergmann , Vineet Gupta , linux-kernel@vger.kernel.org, Masahiro Yamada , linux-snps-arc@lists.infradead.org MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org arch/arc/Makefile overrides -O2 with -O3. This is the only user of ARCH_CFLAGS. There is no user of ARCH_CPPFLAGS or ARCH_AFLAGS. My plan is to remove ARCH_{CPP,A,C}FLAGS after refactoring the ARC Makefile. Currently, ARC has no way to enable -Wmaybe-uninitialized because both -O3 and -Os disable it. Enabling it will be useful for compile-testing. This commit allows allmodconfig (, which defaults to -O2) to enable it. Add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y to all the defconfig files in arch/arc/configs/ in order to keep the current config settings. Signed-off-by: Masahiro Yamada Acked-by: Vineet Gupta --- Makefile | 10 ++++++---- arch/arc/Makefile | 8 -------- arch/arc/configs/axs101_defconfig | 1 + arch/arc/configs/axs103_defconfig | 1 + arch/arc/configs/axs103_smp_defconfig | 1 + arch/arc/configs/haps_hs_defconfig | 1 + arch/arc/configs/haps_hs_smp_defconfig | 1 + arch/arc/configs/hsdk_defconfig | 1 + arch/arc/configs/nps_defconfig | 1 + arch/arc/configs/nsim_700_defconfig | 1 + arch/arc/configs/nsim_hs_defconfig | 1 + arch/arc/configs/nsim_hs_smp_defconfig | 1 + arch/arc/configs/nsimosci_defconfig | 1 + arch/arc/configs/nsimosci_hs_defconfig | 1 + arch/arc/configs/nsimosci_hs_smp_defconfig | 1 + arch/arc/configs/tb10x_defconfig | 1 + arch/arc/configs/vdk_hs38_defconfig | 1 + arch/arc/configs/vdk_hs38_smp_defconfig | 1 + init/Kconfig | 12 ++++++++++-- 19 files changed, 32 insertions(+), 14 deletions(-) diff --git a/Makefile b/Makefile index bc55f366677d..891e47da503f 100644 --- a/Makefile +++ b/Makefile @@ -716,10 +716,12 @@ KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) -ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += -Os -else -KBUILD_CFLAGS += -O2 +ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE +KBUILD_CFLAGS += -O2 +else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 +KBUILD_CFLAGS += -O3 +else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +KBUILD_CFLAGS += -Os endif ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED diff --git a/arch/arc/Makefile b/arch/arc/Makefile index ee6d1184c2b1..f1c44cccf8d6 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -48,14 +48,6 @@ endif cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) -ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE -# Generic build system uses -O2, we want -O3 -# Note: No need to add to cflags-y as that happens anyways -# -# Disable the false maybe-uninitialized warings gcc spits out at -O3 -ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) -endif - # small data is default for elf32 tool-chain. If not usable, disable it # This also allows repurposing GP as scratch reg to gcc reg allocator disable_small_data := y diff --git a/arch/arc/configs/axs101_defconfig b/arch/arc/configs/axs101_defconfig index e31a8ebc3ecc..0016149f9583 100644 --- a/arch/arc/configs/axs101_defconfig +++ b/arch/arc/configs/axs101_defconfig @@ -9,6 +9,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/axs103_defconfig b/arch/arc/configs/axs103_defconfig index e0e8567f0d75..5b031582a1cf 100644 --- a/arch/arc/configs/axs103_defconfig +++ b/arch/arc/configs/axs103_defconfig @@ -9,6 +9,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/axs103_smp_defconfig b/arch/arc/configs/axs103_smp_defconfig index fcbc952bc75b..d4eec39e0112 100644 --- a/arch/arc/configs/axs103_smp_defconfig +++ b/arch/arc/configs/axs103_smp_defconfig @@ -9,6 +9,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/haps_hs_defconfig b/arch/arc/configs/haps_hs_defconfig index 436f2135bdc1..47ff8a97e42d 100644 --- a/arch/arc/configs/haps_hs_defconfig +++ b/arch/arc/configs/haps_hs_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EXPERT=y CONFIG_PERF_EVENTS=y # CONFIG_COMPAT_BRK is not set diff --git a/arch/arc/configs/haps_hs_smp_defconfig b/arch/arc/configs/haps_hs_smp_defconfig index 33a787c375e2..9685fd5f57a4 100644 --- a/arch/arc/configs/haps_hs_smp_defconfig +++ b/arch/arc/configs/haps_hs_smp_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig index 403125d9c9a3..9b9a74444ce2 100644 --- a/arch/arc/configs/hsdk_defconfig +++ b/arch/arc/configs/hsdk_defconfig @@ -9,6 +9,7 @@ CONFIG_NAMESPACES=y # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y CONFIG_BLK_DEV_RAM=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/nps_defconfig b/arch/arc/configs/nps_defconfig index f0a077c00efa..5978d4d7d5b0 100644 --- a/arch/arc/configs/nps_defconfig +++ b/arch/arc/configs/nps_defconfig @@ -6,6 +6,7 @@ CONFIG_HIGH_RES_TIMERS=y CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_SYSCTL_SYSCALL=y # CONFIG_EPOLL is not set # CONFIG_SIGNALFD is not set diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig index de398c7b10b3..2b9b11474640 100644 --- a/arch/arc/configs/nsim_700_defconfig +++ b/arch/arc/configs/nsim_700_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_KALLSYMS_ALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y diff --git a/arch/arc/configs/nsim_hs_defconfig b/arch/arc/configs/nsim_hs_defconfig index 2dbd34a9ff07..bab3dd255841 100644 --- a/arch/arc/configs/nsim_hs_defconfig +++ b/arch/arc/configs/nsim_hs_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_KALLSYMS_ALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y diff --git a/arch/arc/configs/nsim_hs_smp_defconfig b/arch/arc/configs/nsim_hs_smp_defconfig index c7135f1e2583..90d2d50fb8dc 100644 --- a/arch/arc/configs/nsim_hs_smp_defconfig +++ b/arch/arc/configs/nsim_hs_smp_defconfig @@ -8,6 +8,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_KALLSYMS_ALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig index 385a71d3c478..5dd470b6609e 100644 --- a/arch/arc/configs/nsimosci_defconfig +++ b/arch/arc/configs/nsimosci_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_KALLSYMS_ALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y diff --git a/arch/arc/configs/nsimosci_hs_defconfig b/arch/arc/configs/nsimosci_hs_defconfig index 248a2c3bdc12..3532e86f7bff 100644 --- a/arch/arc/configs/nsimosci_hs_defconfig +++ b/arch/arc/configs/nsimosci_hs_defconfig @@ -10,6 +10,7 @@ CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_KALLSYMS_ALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig b/arch/arc/configs/nsimosci_hs_smp_defconfig index 1a4bc7b660fb..d90448bee064 100644 --- a/arch/arc/configs/nsimosci_hs_smp_defconfig +++ b/arch/arc/configs/nsimosci_hs_smp_defconfig @@ -8,6 +8,7 @@ CONFIG_IKCONFIG_PROC=y # CONFIG_UTS_NS is not set # CONFIG_PID_NS is not set CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_PERF_EVENTS=y # CONFIG_COMPAT_BRK is not set CONFIG_KPROBES=y diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig index dc739bd093e3..3a138f8c7299 100644 --- a/arch/arc/configs/tb10x_defconfig +++ b/arch/arc/configs/tb10x_defconfig @@ -14,6 +14,7 @@ CONFIG_INITRAMFS_SOURCE="../tb10x-rootfs.cpio" CONFIG_INITRAMFS_ROOT_UID=2100 CONFIG_INITRAMFS_ROOT_GID=501 # CONFIG_RD_GZIP is not set +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_SYSCTL_SYSCALL=y CONFIG_KALLSYMS_ALL=y # CONFIG_AIO is not set diff --git a/arch/arc/configs/vdk_hs38_defconfig b/arch/arc/configs/vdk_hs38_defconfig index 0c3b21416819..d7c858df520c 100644 --- a/arch/arc/configs/vdk_hs38_defconfig +++ b/arch/arc/configs/vdk_hs38_defconfig @@ -4,6 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/arch/arc/configs/vdk_hs38_smp_defconfig b/arch/arc/configs/vdk_hs38_smp_defconfig index f9ad9d3ee702..015c1d43889e 100644 --- a/arch/arc/configs/vdk_hs38_smp_defconfig +++ b/arch/arc/configs/vdk_hs38_smp_defconfig @@ -4,6 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y # CONFIG_VM_EVENT_COUNTERS is not set diff --git a/init/Kconfig b/init/Kconfig index 149efd82447f..92118505dd33 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1209,14 +1209,22 @@ choice default CC_OPTIMIZE_FOR_PERFORMANCE config CC_OPTIMIZE_FOR_PERFORMANCE - bool "Optimize for performance" + bool "Optimize for performance (-O2)" help This is the default optimization level for the kernel, building with the "-O2" compiler flag for best performance and most helpful compile-time warnings. +config CC_OPTIMIZE_FOR_PERFORMANCE_O3 + bool "Optimize more for performance (-O3)" + depends on ARC + imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives + help + Choosing this option will pass "-O3" to your compiler to optimize + the kernel yet more for performance. + config CC_OPTIMIZE_FOR_SIZE - bool "Optimize for size" + bool "Optimize for size (-Os)" imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives help Choosing this option will pass "-Os" to your compiler resulting From patchwork Tue Aug 20 17:09:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 1150310 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=socionext.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="u/gdpnht"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=nifty.com header.i=@nifty.com header.b="tMeVW1PC"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46Cck41mWxz9sBF for ; Wed, 21 Aug 2019 03:10:20 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ckG23J0tITA+WWgtwZSTn0PSjPEQ4udfMiQR1y81nuk=; b=u/gdpnhtO1BfdJEDlNa8dbrTrf lG49JKB3DOjjmdQtQPWXMTXd0QxNv8BJqW6dvsbo4o4eb3FY8OUu6z4fR1lwIdePbJuHBRi4pdcv2 WFZguAaC1WT88eVGJglMOaU4L6Fg2xdBzx2xRFVdOts7ihGVoVbvdWyO6DWqy3Lsnkxrjv5FKCD5j r+gwzEqBT2hXw+QcSKp3uRNHPDbUcQemkegcyvDja1jj2azdNC7Rav6HkAOi/10F6pVnn7w8Qr4/d 7MXu+R0+pEVg0ud22Ic77amwIcNlc4YntrFE41V3yacVm1v/1jWe8nzp1DDdc3gFXmjQz5ESvr2ZG APntCWIQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i07eE-0007D7-Bb; Tue, 20 Aug 2019 17:10:18 +0000 Received: from conuserg-12.nifty.com ([210.131.2.79]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i07e9-000741-Q8 for linux-snps-arc@lists.infradead.org; Tue, 20 Aug 2019 17:10:16 +0000 Received: from grover.flets-west.jp (softbank126125143222.bbtec.net [126.125.143.222]) (authenticated) by conuserg-12.nifty.com with ESMTP id x7KH9n4B020646; Wed, 21 Aug 2019 02:09:51 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-12.nifty.com x7KH9n4B020646 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1566320991; bh=35oiB6f8NsCtFMF7x1hxhc8poRW8t8acsr/yhS3f0ik=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tMeVW1PC/8Tj879Rns8s6qCDOSlbv4RDlNSrW3j7HYZqJwf6dv3u3uIcY+gN7kLSn TCuar2EmcFm7NxZtsVg8mAa08vWK1p9XcwgFiNIt1EpkAAJYioVe7omBpue7SJQ8+9 8txjR6zoN3buM/Scidy2yLWnxFBuafEm+Kopf+ABVHbOlF3w6okX2SF0sBByB8DV/y Y44FCITM9AjczWiTbYI3IVHnfaJ80BchCxWgPnsO+4huR5p5WXmfLpLZkUxV6V7IrE UcEvr/AfO3edtFi8A/Wafj9SJWN25LyRRTdavTp8artaPkppC4e71M/6KUa4CZLQqk 1ewDxPAgaAOsA== X-Nifty-SrcIP: [126.125.143.222] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Subject: [PATCH 3/3] kbuild: remove ARCH_{CPP,A,C}FLAGS Date: Wed, 21 Aug 2019 02:09:41 +0900 Message-Id: <20190820170941.26193-3-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190820170941.26193-1-yamada.masahiro@socionext.com> References: <20190820170941.26193-1-yamada.masahiro@socionext.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190820_101014_149574_62592A66 X-CRM114-Status: UNSURE ( 7.61 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [210.131.2.79 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Marek , Arnd Bergmann , Jonathan Corbet , Vineet Gupta , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Masahiro Yamada , linux-snps-arc@lists.infradead.org MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org These flags were added by commit 61754c18752f ("kbuild: Allow arch Makefiles to override {cpp,ld,c}flags") to allow ARC to override -O2. We did not see any other usage after all. Now that ARC switched to CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3, there is no more user of these variables. Signed-off-by: Masahiro Yamada --- Documentation/kbuild/makefiles.rst | 7 ------- Makefile | 14 ++++---------- 2 files changed, 4 insertions(+), 17 deletions(-) diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst index 36ba92e199d2..712cdbcdbe91 100644 --- a/Documentation/kbuild/makefiles.rst +++ b/Documentation/kbuild/makefiles.rst @@ -988,13 +988,6 @@ When kbuild executes, the following steps are followed (roughly): $(KBUILD_ARFLAGS) set by the top level Makefile to "D" (deterministic mode) if this option is supported by $(AR). - ARCH_CPPFLAGS, ARCH_AFLAGS, ARCH_CFLAGS Overrides the kbuild defaults - - These variables are appended to the KBUILD_CPPFLAGS, - KBUILD_AFLAGS, and KBUILD_CFLAGS, respectively, after the - top-level Makefile has set any other flags. This provides a - means for an architecture to override the defaults. - KBUILD_LDS The linker script with full path. Assigned by the top-level Makefile. diff --git a/Makefile b/Makefile index 891e47da503f..6551f136afb0 100644 --- a/Makefile +++ b/Makefile @@ -661,11 +661,6 @@ RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc export RETPOLINE_CFLAGS export RETPOLINE_VDSO_CFLAGS -# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default -# values of the respective KBUILD_* variables -ARCH_CPPFLAGS := -ARCH_AFLAGS := -ARCH_CFLAGS := include arch/$(SRCARCH)/Makefile ifdef need-config @@ -918,11 +913,10 @@ include scripts/Makefile.kasan include scripts/Makefile.extrawarn include scripts/Makefile.ubsan -# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the -# last assignments -KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) -KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) -KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) +# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments +KBUILD_CPPFLAGS += $(KCPPFLAGS) +KBUILD_AFLAGS += $(KAFLAGS) +KBUILD_CFLAGS += $(KCFLAGS) KBUILD_LDFLAGS_MODULE += --build-id LDFLAGS_vmlinux += --build-id