From patchwork Thu Mar 16 10:37:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 739768 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vkQRp5p7kz9rxw for ; Thu, 16 Mar 2017 21:57:58 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3vkQRp4ryBzDsN9 for ; Thu, 16 Mar 2017 21:57:58 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3vkQ0Q42ZdzDqvL for ; Thu, 16 Mar 2017 21:37:42 +1100 (AEDT) Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v2GAXnRM091439 for ; Thu, 16 Mar 2017 06:37:32 -0400 Received: from e15.ny.us.ibm.com (e15.ny.us.ibm.com [129.33.205.205]) by mx0a-001b2d01.pphosted.com with ESMTP id 297nd0b73s-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 16 Mar 2017 06:37:31 -0400 Received: from localhost by e15.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 16 Mar 2017 06:37:27 -0400 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp23032.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v2GAbQ5s37159010; Thu, 16 Mar 2017 10:37:26 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A9C8A2803A; Thu, 16 Mar 2017 06:37:24 -0400 (EDT) Received: from skywalker.in.ibm.com (unknown [9.124.35.129]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP id 26E3B28046; Thu, 16 Mar 2017 06:37:22 -0400 (EDT) From: "Aneesh Kumar K.V" To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au Subject: [PATCH V4 04/14] powerpc/mm: Remove redundant TASK_SIZE_USER64 checks Date: Thu, 16 Mar 2017 16:07:03 +0530 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1489660633-24125-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1489660633-24125-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17031610-0036-0000-0000-000001B129A0 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006792; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000206; SDB=6.00834597; UDB=6.00409881; IPR=6.00612252; BA=6.00005214; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00014671; XFM=3.00000013; UTC=2017-03-16 10:37:29 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17031610-0037-0000-0000-00003EF06360 Message-Id: <1489660633-24125-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-03-16_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1703160085 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The check against VSID range is implied when we check task size against hash and radix pgtable range[1], because we make sure page table range cannot exceed vsid range. [1] BUILD_BUG_ON(TASK_SIZE_USER64 > H_PGTABLE_RANGE); BUILD_BUG_ON(TASK_SIZE_USER64 > RADIX_PGTABLE_RANGE); The check for smaller task size is also removed here, because the follow up patch will support a tasksize smaller than pgtable range. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/init_64.c | 4 ---- arch/powerpc/mm/pgtable_64.c | 5 ----- 2 files changed, 9 deletions(-) diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 9be992083d2a..8f6f2a173e47 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -71,10 +71,6 @@ #if H_PGTABLE_RANGE > USER_VSID_RANGE #warning Limited user VSID range means pagetable space is wasted #endif - -#if (TASK_SIZE_USER64 < H_PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE) -#warning TASK_SIZE is smaller than it needs to be. -#endif #endif /* CONFIG_PPC_STD_MMU_64 */ phys_addr_t memstart_addr = ~0; diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index ac0c7ee60de0..af660f2b2ae3 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -56,11 +56,6 @@ #include "mmu_decl.h" -#ifdef CONFIG_PPC_STD_MMU_64 -#if TASK_SIZE_USER64 > (1UL << (ESID_BITS + SID_SHIFT)) -#error TASK_SIZE_USER64 exceeds user VSID range -#endif -#endif #ifdef CONFIG_PPC_BOOK3S_64 /*