From patchwork Fri Apr 8 07:25:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 12806192 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 934E1C433FE for ; Fri, 8 Apr 2022 07:25:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E05D26B0072; Fri, 8 Apr 2022 03:25:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D66CD6B0074; Fri, 8 Apr 2022 03:25:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B910F6B0075; Fri, 8 Apr 2022 03:25:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id A87B56B0072 for ; Fri, 8 Apr 2022 03:25:25 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 6F3B997E for ; Fri, 8 Apr 2022 07:25:25 +0000 (UTC) X-FDA: 79332876210.03.DCC2727 Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) by imf14.hostedemail.com (Postfix) with ESMTP id ECF37100003 for ; Fri, 8 Apr 2022 07:25:24 +0000 (UTC) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4KZVC50f5zz9sSc; Fri, 8 Apr 2022 09:25:21 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pJrUuYIa7blv; Fri, 8 Apr 2022 09:25:21 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4KZVC41MpXz9sSd; Fri, 8 Apr 2022 09:25:20 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 145108B796; Fri, 8 Apr 2022 09:25:20 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id MvOMb5sFXmkR; Fri, 8 Apr 2022 09:25:19 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.13]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 9FEE08B792; Fri, 8 Apr 2022 09:25:19 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 2387PCem637063 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 8 Apr 2022 09:25:12 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 2387PCFc637062; Fri, 8 Apr 2022 09:25:12 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Andrew Morton Cc: Christophe Leroy , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Nicholas Piggin Subject: [PATCH v9 2/4] mm, hugetlbfs: Allow an arch to always use generic versions of get_unmapped_area functions Date: Fri, 8 Apr 2022 09:25:00 +0200 Message-Id: <1de521c62387c210d041255ff629730c952cd929.1649401201.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649402687; l=6083; s=20211009; h=from:subject:message-id; bh=W1Q/wOPsiKU9x1pmfcyY3wAdbrx8KvPXs/Wvd0jkPk8=; b=ljI1eIPdAMGtuJJBVRaq+HTD/Zh6cqzoC06kLffT4lHbjj9HRccNrt/OK1eIdjAbGAxM4eFy2Hve sv17H/e3AzAafsjH9LcYVgFx8780fZrrGDY3nu4b4at/teUaXXJb X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= Authentication-Results: imf14.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf14.hostedemail.com: domain of christophe.leroy@csgroup.eu designates 93.17.235.10 as permitted sender) smtp.mailfrom=christophe.leroy@csgroup.eu X-Stat-Signature: spemmebswww4sngonxmyw46w8hgac736 X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: ECF37100003 X-HE-Tag: 1649402724-463859 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: Unlike most architectures, powerpc can only define at runtime if it is going to use the generic arch_get_unmapped_area() or not. Today, powerpc has a copy of the generic arch_get_unmapped_area() because when selection HAVE_ARCH_UNMAPPED_AREA the generic arch_get_unmapped_area() is not available. Rename it generic_get_unmapped_area() and make it independent of HAVE_ARCH_UNMAPPED_AREA. Do the same for arch_get_unmapped_area_topdown() versus HAVE_ARCH_UNMAPPED_AREA_TOPDOWN. Do the same for hugetlb_get_unmapped_area() versus HAVE_ARCH_HUGETLB_UNMAPPED_AREA. Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin --- fs/hugetlbfs/inode.c | 17 +++++++++++++---- include/linux/hugetlb.h | 5 +++++ include/linux/sched/mm.h | 9 +++++++++ mm/mmap.c | 31 ++++++++++++++++++++++++------- 4 files changed, 51 insertions(+), 11 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 99c7477cee5c..09c8313ee1c4 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -195,7 +195,6 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) * Called under mmap_write_lock(mm). */ -#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) @@ -244,9 +243,10 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr, return addr; } -static unsigned long -hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags) +unsigned long +generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; @@ -282,6 +282,15 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return hugetlb_get_unmapped_area_bottomup(file, addr, len, pgoff, flags); } + +#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA +static unsigned long +hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags); +} #endif static size_t diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 53c1b6082a4c..10895adc7635 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -513,6 +513,11 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long flags); #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ +unsigned long +generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); + /* * huegtlb page specific state flags. These flags are located in page.private * of the hugetlb head page. Functions created via the below macros should be diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index a80356e9dc69..18b2d2b2e0ca 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -145,6 +145,15 @@ extern unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); + +unsigned long +generic_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); +unsigned long +generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); #else static inline void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) {} diff --git a/mm/mmap.c b/mm/mmap.c index 3aa839f81e63..08b40a9715ee 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2136,10 +2136,10 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info) * * This function "knows" that -ENOMEM has the bits set. */ -#ifndef HAVE_ARCH_UNMAPPED_AREA unsigned long -arch_get_unmapped_area(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags) +generic_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; @@ -2169,17 +2169,25 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, info.align_offset = 0; return vm_unmapped_area(&info); } + +#ifndef HAVE_ARCH_UNMAPPED_AREA +unsigned long +arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_get_unmapped_area(filp, addr, len, pgoff, flags); +} #endif /* * This mmap-allocator allocates new areas top-down from below the * stack's low limit (the base): */ -#ifndef HAVE_ARCH_UNMAPPED_AREA_TOPDOWN unsigned long -arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) +generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct vm_area_struct *vma, *prev; struct mm_struct *mm = current->mm; @@ -2227,6 +2235,15 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, return addr; } + +#ifndef HAVE_ARCH_UNMAPPED_AREA_TOPDOWN +unsigned long +arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_get_unmapped_area_topdown(filp, addr, len, pgoff, flags); +} #endif unsigned long