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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 21 Jan 2019 08:05:33 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0L85WDa57737362 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 21 Jan 2019 08:05:32 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6E13D52052; Mon, 21 Jan 2019 08:05:32 +0000 (GMT) Received: from rapoport-lnx (unknown [9.148.207.125]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id 9446052051; Mon, 21 Jan 2019 08:05:27 +0000 (GMT) Received: by rapoport-lnx (sSMTP sendmail emulation); Mon, 21 Jan 2019 10:05:25 +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 v2 13/21] arch: don't memset(0) memory returned by memblock_alloc() Date: Mon, 21 Jan 2019 10:04:00 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com> References: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19012108-0020-0000-0000-000003092EB6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19012108-0021-0000-0000-0000215A5BFF Message-Id: <1548057848-15136-14-git-send-email-rppt@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-21_04:,, 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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901210066 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@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 Acked-by: Geert Uytterhoeven # m68k --- 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;