From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C51AFA372A for ; Wed, 16 Oct 2019 16:24:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D22FA2168B for ; Wed, 16 Oct 2019 16:24:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="EIT3ymoM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D22FA2168B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=synopsys.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AC1B78E0007; Wed, 16 Oct 2019 12:24:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 785538E0008; Wed, 16 Oct 2019 12:24:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 50F7A8E000B; Wed, 16 Oct 2019 12:24:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0103.hostedemail.com [216.40.44.103]) by kanga.kvack.org (Postfix) with ESMTP id 009708E0008 for ; Wed, 16 Oct 2019 12:24:08 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id A828E82EB77D for ; Wed, 16 Oct 2019 16:24:08 +0000 (UTC) X-FDA: 76050169776.09.trail84_6f34069fb451 X-HE-Tag: trail84_6f34069fb451 X-Filterd-Recvd-Size: 5121 Received: from smtprelay-out1.synopsys.com (smtprelay-out1.synopsys.com [149.117.87.133]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Wed, 16 Oct 2019 16:24:07 +0000 (UTC) Received: from mailhost.synopsys.com (dc8-mailhost1.synopsys.com [10.13.135.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id F0BB6C2FFF; Wed, 16 Oct 2019 16:24:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1571243046; bh=UXULR1r/3kxBPP9KtRfgHaDn7Fn06VTK/VtH3ylzUjM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EIT3ymoMWVR4KhvFSgq+nGmBvxD2ZVa2NLkvX3cF/zkj+e9kji/YD3WEZLawNuKyY 0VmsXCG4BfAjRESSunMDPOwxo2t2Y/5nejkmcptlQzmgx3AotkTgl7NlMCS5MrSMVe Lz9RhZ4D0Tk89HaED4R8wQ5TEtf+SJ161Jk9ySs91GP+yqCBj1ftQK+QBJ913fXX/k zwLLYAAnG7jH+Nen1GiTr8MX86UP94A7WDh6rULvwmNe+Ah/0g8L+SFdDk6+TQIg9P Cfmz7DxKvuneDblV9O7JpIoE6guZ9xHv3Dljf4gND94gTm75AvN9UDC6g7nF/ERGKi 0ILTv79lp6D5A== Received: from vineetg-Latitude-E7450.internal.synopsys.com (vineetg-latitude-e7450.internal.synopsys.com [10.10.161.61]) by mailhost.synopsys.com (Postfix) with ESMTP id 5CDF9A0078; Wed, 16 Oct 2019 16:24:04 +0000 (UTC) From: Vineet Gupta To: linux-mm@kvack.org Cc: linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Arnd Bergmann , Will Deacon , "Aneesh Kumar K . V" , Andrew Morton , Nick Piggin , Peter Zijlstra , "Kirill A . Shutemov" , Linus Torvalds , Vineet Gupta Subject: [PATCH v3 1/5] ARC: mm: remove __ARCH_USE_5LEVEL_HACK Date: Wed, 16 Oct 2019 09:23:56 -0700 Message-Id: <20191016162400.14796-2-vgupta@synopsys.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191016162400.14796-1-vgupta@synopsys.com> References: <20191016162400.14796-1-vgupta@synopsys.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: With paging code made 5-level compliant, this is no longer needed. ARC has software page walker with 2 lookup levels (pgd -> pte) This was expected to be non functional change but ended with slight code bloat due to needless inclusions of p*d_free_tlb() macros which will be addressed in further patches. | bloat-o-meter2 vmlinux-[AB]* | add/remove: 0/0 grow/shrink: 2/0 up/down: 128/0 (128) | function old new delta | free_pgd_range 546 656 +110 | p4d_clear_bad 2 20 +18 | Total: Before=3D4137148, After=3D4137276, chg 0.000000% Acked-by: Kirill A. Shutemov Signed-off-by: Vineet Gupta --- arch/arc/include/asm/pgtable.h | 1 - arch/arc/mm/fault.c | 10 ++++++++-- arch/arc/mm/highmem.c | 4 +++- 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtabl= e.h index 7addd0301c51..b917b596f7fb 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -33,7 +33,6 @@ #define _ASM_ARC_PGTABLE_H =20 #include -#define __ARCH_USE_5LEVEL_HACK #include #include #include /* to propagate CONFIG_ARC_MMU_VER */ diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 3861543b66a0..fb86bc3e9b35 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -30,6 +30,7 @@ noinline static int handle_kernel_vaddr_fault(unsigned = long address) * with the 'reference' page table. */ pgd_t *pgd, *pgd_k; + p4d_t *p4d, *p4d_k; pud_t *pud, *pud_k; pmd_t *pmd, *pmd_k; =20 @@ -39,8 +40,13 @@ noinline static int handle_kernel_vaddr_fault(unsigned= long address) if (!pgd_present(*pgd_k)) goto bad_area; =20 - pud =3D pud_offset(pgd, address); - pud_k =3D pud_offset(pgd_k, address); + p4d =3D p4d_offset(pgd, address); + p4d_k =3D p4d_offset(pgd_k, address); + if (!p4d_present(*p4d_k)) + goto bad_area; + + pud =3D pud_offset(p4d, address); + pud_k =3D pud_offset(p4d_k, address); if (!pud_present(*pud_k)) goto bad_area; =20 diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c index a4856bfaedf3..fc8849e4f72e 100644 --- a/arch/arc/mm/highmem.c +++ b/arch/arc/mm/highmem.c @@ -111,12 +111,14 @@ EXPORT_SYMBOL(__kunmap_atomic); static noinline pte_t * __init alloc_kmap_pgtable(unsigned long kvaddr) { pgd_t *pgd_k; + p4d_t *p4d_k; pud_t *pud_k; pmd_t *pmd_k; pte_t *pte_k; =20 pgd_k =3D pgd_offset_k(kvaddr); - pud_k =3D pud_offset(pgd_k, kvaddr); + p4d_k =3D p4d_offset(pgd_k, kvaddr); + pud_k =3D pud_offset(p4d_k, kvaddr); pmd_k =3D pmd_offset(pud_k, kvaddr); =20 pte_k =3D (pte_t *)memblock_alloc_low(PAGE_SIZE, PAGE_SIZE); --=20 2.20.1