From patchwork Wed May 15 21:35:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 10945367 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 87D36924 for ; Wed, 15 May 2019 21:36:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 77B8F2873E for ; Wed, 15 May 2019 21:36:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A7A728748; Wed, 15 May 2019 21:36:21 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable 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 120B12873E for ; Wed, 15 May 2019 21:36:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727327AbfEOVgP (ORCPT ); Wed, 15 May 2019 17:36:15 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:38536 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727280AbfEOVgO (ORCPT ); Wed, 15 May 2019 17:36:14 -0400 Received: by mail-pl1-f196.google.com with SMTP id f97so490656plb.5 for ; Wed, 15 May 2019 14:36:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=zjB9LsovF8lpor6w+CVg9dpdpQizlQADdXWnWKh0+Rg=; b=VYyAWbWi7W7y+gL1aVVELgMHHzDwCnQoRhq01306PoaSmD2u7UqvAOGVFr/KZMuRCm Ad56tj2pg1vt1yOuEEChvUVluDdPThEqtHcqeTOoLtCbGuWm6Ayjuh8w7xMROHdTGo2S wbtlJxG2lTEdzsemWMiOsQy/Y140eT1YBdVko= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=zjB9LsovF8lpor6w+CVg9dpdpQizlQADdXWnWKh0+Rg=; b=lVP74L+Zmqrlj6nYXek/78cC1J2IAYxUseyJ6yr/YY+FTK4kvNulSQuc+6/jNmcFjA sY1cq+aIydTIHkYFe0izF4cGdnp2dVb10qMgDcyB+89/NPV/g6cpdb493/Z7q0+AGAHX m+zx0JBOF4tD/JNi8qXjgZP15apxgR1IGjs+LnI3lwwiDnnscI7TSquHEaHQ/sivor7u +rD+z4fXTwVMydSVOutnYCwQWy7r68xz7Iiv4+RsDh0qM/3G6yywy0vs4k8SpGmiwdb4 WC1nyeImr9sFkGMj7Vqb7sCOGecFQGMoxddGkOJ4hChGQAf3Cr40eNpJhzbZUrpVrdKg 9SNg== X-Gm-Message-State: APjAAAVX31IFOQV72B9jxvc3atvZOgJ2fbbLLL/iafuKLRpROwo2GeyC 3PqkLmSspzh0EKlhJXJ5R5kPMQ== X-Google-Smtp-Source: APXvYqxHN70es4b0dCS2R1CKfqsJmikP3jLaCFw6mu2/8pQd3QzrWRXNHoRuaFwwglq5MBBI8QPEZA== X-Received: by 2002:a17:902:bc85:: with SMTP id bb5mr46246086plb.310.1557956173660; Wed, 15 May 2019 14:36:13 -0700 (PDT) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id q4sm3695279pgb.39.2019.05.15.14.36.09 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Wed, 15 May 2019 14:36:12 -0700 (PDT) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" , Linus Torvalds , Adrian Ratiu , Alexei Starovoitov , Andrew Morton , atishp04@gmail.com, bpf@vger.kernel.org, Brendan Gregg , Brendan Gregg , dancol@google.com, Daniel Borkmann , Dan Williams , dietmar.eggemann@arm.com, duyuchao , gregkh@linuxfoundation.org, Guenter Roeck , Jonathan Corbet , Karim Yaghmour , Kees Cook , kernel-team@android.com, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-trace-devel@vger.kernel.org, Manjo Raja Rao , Masahiro Yamada , Masami Hiramatsu , =?utf-8?q?Micha=C5=82_Gregorczyk?= , Michal Gregorczyk , Mohammad Husain , Olof Johansson , qais.yousef@arm.com, rdunlap@infradead.org, rostedt@goodmis.org, Shuah Khan , Srinivas Ramana , Tamir Carmeli , yhs@fb.com Subject: [PATCH v4 2/2] kheaders: Do not regenerate archive if config is not changed Date: Wed, 15 May 2019 17:35:52 -0400 Message-Id: <20190515213552.203737-3-joel@joelfernandes.org> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog In-Reply-To: <20190515213552.203737-1-joel@joelfernandes.org> References: <20190515213552.203737-1-joel@joelfernandes.org> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Linus reported an issue that doing an allmodconfig was causing the kheaders archive to be regenerated even though the config is the same. This patch fixes the issue by ignoring the config-related header files for "knowing when to regenerate based on timestamps". Instead, if the CONFIG_X_Y option really changes, then we there are the include/config/X/Y.h which will already tells us "if a config really changed". So we don't really need these files for regeneration detection anyway, and ignoring them fixes Linus's issue. Reported-by: Linus Torvalds Signed-off-by: Joel Fernandes (Google) --- kernel/gen_kheaders.sh | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh index 581b83534587..9a34e1d9bd7f 100755 --- a/kernel/gen_kheaders.sh +++ b/kernel/gen_kheaders.sh @@ -31,9 +31,8 @@ arch/$SRCARCH/include/ # This block is useful for debugging the incremental builds. # Uncomment it for debugging. -# iter=1 -# if [ ! -f /tmp/iter ]; then echo 1 > /tmp/iter; -# else; iter=$(($(cat /tmp/iter) + 1)); fi +# if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter; +# else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi # find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter # find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter @@ -43,10 +42,18 @@ arch/$SRCARCH/include/ pushd $kroot > /dev/null src_files_md5="$(find $src_file_list -type f | grep -v "include/generated/compile.h" | + grep -v "include/generated/autoconf.h" | + grep -v "include/config/auto.conf" | + grep -v "include/config/auto.conf.cmd" | + grep -v "include/config/tristate.conf" | xargs ls -lR | md5sum | cut -d ' ' -f1)" popd > /dev/null obj_files_md5="$(find $obj_file_list -type f | grep -v "include/generated/compile.h" | + grep -v "include/generated/autoconf.h" | + grep -v "include/config/auto.conf" | + grep -v "include/config/auto.conf.cmd" | + grep -v "include/config/tristate.conf" | xargs ls -lR | md5sum | cut -d ' ' -f1)" if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi @@ -82,7 +89,7 @@ find $cpio_dir -type f -print0 | tar -Jcf $tarfile -C $cpio_dir/ . > /dev/null -echo "$src_files_md5" > kernel/kheaders.md5 +echo "$src_files_md5" > kernel/kheaders.md5 echo "$obj_files_md5" >> kernel/kheaders.md5 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5