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=-7.9 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0DEC4C43381 for ; Thu, 28 Mar 2019 16:49:47 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8CFAD2173C for ; Thu, 28 Mar 2019 16:49:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8CFAD2173C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44VW7D3ZR1zDqBL for ; Fri, 29 Mar 2019 03:49:44 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=intel.com (client-ip=134.134.136.126; helo=mga18.intel.com; envelope-from=ira.weiny@intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=intel.com Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) (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 44VW2f0Kq0zDqQP for ; Fri, 29 Mar 2019 03:45:42 +1100 (AEDT) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Mar 2019 09:45:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,281,1549958400"; d="scan'208";a="218460196" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by orsmga001.jf.intel.com with ESMTP; 28 Mar 2019 09:45:35 -0700 From: ira.weiny@intel.com To: Andrew Morton , John Hubbard , Michal Hocko , "Kirill A. Shutemov" , Peter Zijlstra , Jason Gunthorpe , Benjamin Herrenschmidt , Paul Mackerras , "David S. Miller" , Martin Schwidefsky , Heiko Carstens , Rich Felker , Yoshinori Sato , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Ralf Baechle , James Hogan Subject: [PATCH V3 2/7] mm/gup: Change write parameter to flags in fast walk Date: Thu, 28 Mar 2019 01:44:17 -0700 Message-Id: <20190328084422.29911-3-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190328084422.29911-1-ira.weiny@intel.com> References: <20190328084422.29911-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-rdma@vger.kernel.org, Ira Weiny , linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, sparclinux@vger.kernel.org, Dan Williams , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Ira Weiny In order to support more options in the GUP fast walk, change the write parameter to flags throughout the call stack. This patch does not change functionality and passes FOLL_WRITE where write was previously used. Reviewed-by: Dan Williams Signed-off-by: Ira Weiny --- Changes from V2 Add review by mm/gup.c | 52 ++++++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 26 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index 12ce886733b9..6304317a308e 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1591,7 +1591,7 @@ static void undo_dev_pagemap(int *nr, int nr_start, struct page **pages) #ifdef CONFIG_ARCH_HAS_PTE_SPECIAL static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { struct dev_pagemap *pgmap = NULL; int nr_start = *nr, ret = 0; @@ -1609,7 +1609,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, if (pte_protnone(pte)) goto pte_unmap; - if (!pte_access_permitted(pte, write)) + if (!pte_access_permitted(pte, flags & FOLL_WRITE)) goto pte_unmap; if (pte_devmap(pte)) { @@ -1661,7 +1661,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, * useful to have gup_huge_pmd even if we can't operate on ptes. */ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { return 0; } @@ -1744,12 +1744,12 @@ static int __gup_device_huge_pud(pud_t pud, pud_t *pudp, unsigned long addr, #endif static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) + unsigned long end, unsigned int flags, struct page **pages, int *nr) { struct page *head, *page; int refs; - if (!pmd_access_permitted(orig, write)) + if (!pmd_access_permitted(orig, flags & FOLL_WRITE)) return 0; if (pmd_devmap(orig)) @@ -1782,12 +1782,12 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr, } static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) + unsigned long end, unsigned int flags, struct page **pages, int *nr) { struct page *head, *page; int refs; - if (!pud_access_permitted(orig, write)) + if (!pud_access_permitted(orig, flags & FOLL_WRITE)) return 0; if (pud_devmap(orig)) @@ -1820,13 +1820,13 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr, } static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr, - unsigned long end, int write, + unsigned long end, unsigned int flags, struct page **pages, int *nr) { int refs; struct page *head, *page; - if (!pgd_access_permitted(orig, write)) + if (!pgd_access_permitted(orig, flags & FOLL_WRITE)) return 0; BUILD_BUG_ON(pgd_devmap(orig)); @@ -1857,7 +1857,7 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr, } static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { unsigned long next; pmd_t *pmdp; @@ -1880,7 +1880,7 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, if (pmd_protnone(pmd)) return 0; - if (!gup_huge_pmd(pmd, pmdp, addr, next, write, + if (!gup_huge_pmd(pmd, pmdp, addr, next, flags, pages, nr)) return 0; @@ -1890,9 +1890,9 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, * pmd format and THP pmd format */ if (!gup_huge_pd(__hugepd(pmd_val(pmd)), addr, - PMD_SHIFT, next, write, pages, nr)) + PMD_SHIFT, next, flags, pages, nr)) return 0; - } else if (!gup_pte_range(pmd, addr, next, write, pages, nr)) + } else if (!gup_pte_range(pmd, addr, next, flags, pages, nr)) return 0; } while (pmdp++, addr = next, addr != end); @@ -1900,7 +1900,7 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, } static int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { unsigned long next; pud_t *pudp; @@ -1913,14 +1913,14 @@ static int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end, if (pud_none(pud)) return 0; if (unlikely(pud_huge(pud))) { - if (!gup_huge_pud(pud, pudp, addr, next, write, + if (!gup_huge_pud(pud, pudp, addr, next, flags, pages, nr)) return 0; } else if (unlikely(is_hugepd(__hugepd(pud_val(pud))))) { if (!gup_huge_pd(__hugepd(pud_val(pud)), addr, - PUD_SHIFT, next, write, pages, nr)) + PUD_SHIFT, next, flags, pages, nr)) return 0; - } else if (!gup_pmd_range(pud, addr, next, write, pages, nr)) + } else if (!gup_pmd_range(pud, addr, next, flags, pages, nr)) return 0; } while (pudp++, addr = next, addr != end); @@ -1928,7 +1928,7 @@ static int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end, } static int gup_p4d_range(pgd_t pgd, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { unsigned long next; p4d_t *p4dp; @@ -1943,9 +1943,9 @@ static int gup_p4d_range(pgd_t pgd, unsigned long addr, unsigned long end, BUILD_BUG_ON(p4d_huge(p4d)); if (unlikely(is_hugepd(__hugepd(p4d_val(p4d))))) { if (!gup_huge_pd(__hugepd(p4d_val(p4d)), addr, - P4D_SHIFT, next, write, pages, nr)) + P4D_SHIFT, next, flags, pages, nr)) return 0; - } else if (!gup_pud_range(p4d, addr, next, write, pages, nr)) + } else if (!gup_pud_range(p4d, addr, next, flags, pages, nr)) return 0; } while (p4dp++, addr = next, addr != end); @@ -1953,7 +1953,7 @@ static int gup_p4d_range(pgd_t pgd, unsigned long addr, unsigned long end, } static void gup_pgd_range(unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) + unsigned int flags, struct page **pages, int *nr) { unsigned long next; pgd_t *pgdp; @@ -1966,14 +1966,14 @@ static void gup_pgd_range(unsigned long addr, unsigned long end, if (pgd_none(pgd)) return; if (unlikely(pgd_huge(pgd))) { - if (!gup_huge_pgd(pgd, pgdp, addr, next, write, + if (!gup_huge_pgd(pgd, pgdp, addr, next, flags, pages, nr)) return; } else if (unlikely(is_hugepd(__hugepd(pgd_val(pgd))))) { if (!gup_huge_pd(__hugepd(pgd_val(pgd)), addr, - PGDIR_SHIFT, next, write, pages, nr)) + PGDIR_SHIFT, next, flags, pages, nr)) return; - } else if (!gup_p4d_range(pgd, addr, next, write, pages, nr)) + } else if (!gup_p4d_range(pgd, addr, next, flags, pages, nr)) return; } while (pgdp++, addr = next, addr != end); } @@ -2027,7 +2027,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, if (gup_fast_permitted(start, nr_pages)) { local_irq_save(flags); - gup_pgd_range(start, end, write, pages, &nr); + gup_pgd_range(start, end, write ? FOLL_WRITE : 0, pages, &nr); local_irq_restore(flags); } @@ -2069,7 +2069,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, if (gup_fast_permitted(start, nr_pages)) { local_irq_disable(); - gup_pgd_range(addr, end, write, pages, &nr); + gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); local_irq_enable(); ret = nr; } -- 2.20.1