From patchwork Wed Jan 16 13:44:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 10766147 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 3502A13BF for ; Wed, 16 Jan 2019 13:47:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 25F272E1B4 for ; Wed, 16 Jan 2019 13:47:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 22FF02E1B3; Wed, 16 Jan 2019 13:47:24 +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=-7.9 required=2.0 tests=BAYES_00,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 932132E1AA for ; Wed, 16 Jan 2019 13:47:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393393AbfAPNrW (ORCPT ); Wed, 16 Jan 2019 08:47:22 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:34194 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2393362AbfAPNpq (ORCPT ); Wed, 16 Jan 2019 08:45:46 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id x0GDf5Gu033233 for ; Wed, 16 Jan 2019 08:45:45 -0500 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0b-001b2d01.pphosted.com with ESMTP id 2q22ukyxb8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 16 Jan 2019 08:45:45 -0500 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 16 Jan 2019 13:45:42 -0000 Received: from b06cxnps3074.portsmouth.uk.ibm.com (9.149.109.194) by e06smtp05.uk.ibm.com (192.168.101.135) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 16 Jan 2019 13:45:31 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0GDjUvO57213156 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 16 Jan 2019 13:45:30 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 414374C05E; Wed, 16 Jan 2019 13:45:30 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 232B64C040; Wed, 16 Jan 2019 13:45:26 +0000 (GMT) Received: from rapoport-lnx (unknown [9.148.8.226]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 16 Jan 2019 13:45:26 +0000 (GMT) Received: by rapoport-lnx (sSMTP sendmail emulation); Wed, 16 Jan 2019 15:45:25 +0200 From: Mike Rapoport To: linux-mm@kvack.org Cc: Andrew Morton , Catalin Marinas , Christoph Hellwig , "David S. Miller" , Dennis Zhou , Geert Uytterhoeven , Greentime Hu , Greg Kroah-Hartman , Guan Xuetao , Guo Ren , Heiko Carstens , Mark Salter , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Paul Burton , Petr Mladek , Rich Felker , Richard Weinberger , Rob Herring , Russell King , Stafford Horne , Tony Luck , Vineet Gupta , Yoshinori Sato , devicetree@vger.kernel.org, kasan-dev@googlegroups.com, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linux-usb@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, openrisc@lists.librecores.org, sparclinux@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, x86@kernel.org, xen-devel@lists.xenproject.org, Mike Rapoport Subject: [PATCH 13/21] arch: don't memset(0) memory returned by memblock_alloc() Date: Wed, 16 Jan 2019 15:44:13 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1547646261-32535-1-git-send-email-rppt@linux.ibm.com> References: <1547646261-32535-1-git-send-email-rppt@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19011613-0020-0000-0000-0000030747CD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19011613-0021-0000-0000-00002158646D Message-Id: <1547646261-32535-14-git-send-email-rppt@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-16_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=870 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901160114 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP memblock_alloc() already clears the allocated memory, no point in doing it twice. Signed-off-by: Mike Rapoport --- arch/c6x/mm/init.c | 1 - arch/h8300/mm/init.c | 1 - arch/ia64/kernel/mca.c | 2 -- arch/m68k/mm/mcfmmu.c | 1 - arch/microblaze/mm/init.c | 6 ++---- arch/sparc/kernel/prom_32.c | 2 -- 6 files changed, 2 insertions(+), 11 deletions(-) diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c index af5ada0..e83c046 100644 --- a/arch/c6x/mm/init.c +++ b/arch/c6x/mm/init.c @@ -40,7 +40,6 @@ void __init paging_init(void) empty_zero_page = (unsigned long) memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *)empty_zero_page, 0, PAGE_SIZE); /* * Set up user data space diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c index 6519252..a157890 100644 --- a/arch/h8300/mm/init.c +++ b/arch/h8300/mm/init.c @@ -68,7 +68,6 @@ void __init paging_init(void) * to a couple of allocated pages. */ empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *)empty_zero_page, 0, PAGE_SIZE); /* * Set up SFC/DFC registers (user data space). diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 74d148b..370bc34 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -400,8 +400,6 @@ ia64_log_init(int sal_info_type) // set up OS data structures to hold error info IA64_LOG_ALLOCATE(sal_info_type, max_size); - memset(IA64_LOG_CURR_BUFFER(sal_info_type), 0, max_size); - memset(IA64_LOG_NEXT_BUFFER(sal_info_type), 0, max_size); } /* diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c index 0de4999..492f953 100644 --- a/arch/m68k/mm/mcfmmu.c +++ b/arch/m68k/mm/mcfmmu.c @@ -44,7 +44,6 @@ void __init paging_init(void) int i; empty_zero_page = (void *) memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *) empty_zero_page, 0, PAGE_SIZE); pg_dir = swapper_pg_dir; memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 44f4b89..bd1cd4b 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -376,10 +376,8 @@ void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask) if (mem_init_done) p = kzalloc(size, mask); - else { + else p = memblock_alloc(size, SMP_CACHE_BYTES); - if (p) - memset(p, 0, size); - } + return p; } diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c index 38940af..e7126ca 100644 --- a/arch/sparc/kernel/prom_32.c +++ b/arch/sparc/kernel/prom_32.c @@ -33,8 +33,6 @@ void * __init prom_early_alloc(unsigned long size) void *ret; ret = memblock_alloc(size, SMP_CACHE_BYTES); - if (ret != NULL) - memset(ret, 0, size); prom_early_allocated += size;