From patchwork Tue Sep 27 16:08:07 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 9352259 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 64775600CB for ; Tue, 27 Sep 2016 16:08:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 561EA286CD for ; Tue, 27 Sep 2016 16:08:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4AF7E2888B; Tue, 27 Sep 2016 16:08:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D632A29297 for ; Tue, 27 Sep 2016 16:08:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934342AbcI0QIq (ORCPT ); Tue, 27 Sep 2016 12:08:46 -0400 Received: from mx2.suse.de ([195.135.220.15]:37336 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755483AbcI0QIf (ORCPT ); Tue, 27 Sep 2016 12:08:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 0309E75013; Tue, 27 Sep 2016 16:08:31 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id EF3E31E10D9; Tue, 27 Sep 2016 18:08:30 +0200 (CEST) From: Jan Kara To: linux-mm@kvack.org Cc: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, Dan Williams , Ross Zwisler , "Kirill A. Shutemov" , Jan Kara Subject: [PATCH 03/20] mm: Use pgoff in struct vm_fault instead of passing it separately Date: Tue, 27 Sep 2016 18:08:07 +0200 Message-Id: <1474992504-20133-4-git-send-email-jack@suse.cz> X-Mailer: git-send-email 2.6.6 In-Reply-To: <1474992504-20133-1-git-send-email-jack@suse.cz> References: <1474992504-20133-1-git-send-email-jack@suse.cz> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP struct vm_fault has already pgoff entry. Use it instead of passing pgoff as a separate argument and then assigning it later. Signed-off-by: Jan Kara Reviewed-by: Ross Zwisler --- mm/memory.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index 447a1ef4a9e3..4c2ec9a9d8af 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2275,7 +2275,7 @@ static int wp_pfn_shared(struct vm_fault *vmf, pte_t orig_pte) if (vma->vm_ops && vma->vm_ops->pfn_mkwrite) { struct vm_fault vmf2 = { .page = NULL, - .pgoff = linear_page_index(vma, vmf->address), + .pgoff = vmf->pgoff, .virtual_address = vmf->address & PAGE_MASK, .flags = FAULT_FLAG_WRITE | FAULT_FLAG_MKWRITE, }; @@ -2844,15 +2844,15 @@ oom: * released depending on flags and vma->vm_ops->fault() return value. * See filemap_fault() and __lock_page_retry(). */ -static int __do_fault(struct vm_fault *vmf, pgoff_t pgoff, - struct page *cow_page, struct page **page, void **entry) +static int __do_fault(struct vm_fault *vmf, struct page *cow_page, + struct page **page, void **entry) { struct vm_area_struct *vma = vmf->vma; struct vm_fault vmf2; int ret; vmf2.virtual_address = vmf->address & PAGE_MASK; - vmf2.pgoff = pgoff; + vmf2.pgoff = vmf->pgoff; vmf2.flags = vmf->flags; vmf2.page = NULL; vmf2.gfp_mask = __get_fault_gfp_mask(vma); @@ -3111,9 +3111,10 @@ late_initcall(fault_around_debugfs); * fault_around_pages() value (and therefore to page order). This way it's * easier to guarantee that we don't cross page table boundaries. */ -static int do_fault_around(struct vm_fault *vmf, pgoff_t start_pgoff) +static int do_fault_around(struct vm_fault *vmf) { unsigned long address = vmf->address, nr_pages, mask; + pgoff_t start_pgoff = vmf->pgoff; pgoff_t end_pgoff; int off, ret = 0; @@ -3171,7 +3172,7 @@ out: return ret; } -static int do_read_fault(struct vm_fault *vmf, pgoff_t pgoff) +static int do_read_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct page *fault_page; @@ -3183,12 +3184,12 @@ static int do_read_fault(struct vm_fault *vmf, pgoff_t pgoff) * something). */ if (vma->vm_ops->map_pages && fault_around_bytes >> PAGE_SHIFT > 1) { - ret = do_fault_around(vmf, pgoff); + ret = do_fault_around(vmf); if (ret) return ret; } - ret = __do_fault(vmf, pgoff, NULL, &fault_page, NULL); + ret = __do_fault(vmf, NULL, &fault_page, NULL); if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))) return ret; @@ -3201,7 +3202,7 @@ static int do_read_fault(struct vm_fault *vmf, pgoff_t pgoff) return ret; } -static int do_cow_fault(struct vm_fault *vmf, pgoff_t pgoff) +static int do_cow_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct page *fault_page, *new_page; @@ -3222,7 +3223,7 @@ static int do_cow_fault(struct vm_fault *vmf, pgoff_t pgoff) return VM_FAULT_OOM; } - ret = __do_fault(vmf, pgoff, new_page, &fault_page, &fault_entry); + ret = __do_fault(vmf, new_page, &fault_page, &fault_entry); if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))) goto uncharge_out; @@ -3237,7 +3238,7 @@ static int do_cow_fault(struct vm_fault *vmf, pgoff_t pgoff) unlock_page(fault_page); put_page(fault_page); } else { - dax_unlock_mapping_entry(vma->vm_file->f_mapping, pgoff); + dax_unlock_mapping_entry(vma->vm_file->f_mapping, vmf->pgoff); } if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))) goto uncharge_out; @@ -3248,7 +3249,7 @@ uncharge_out: return ret; } -static int do_shared_fault(struct vm_fault *vmf, pgoff_t pgoff) +static int do_shared_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct page *fault_page; @@ -3256,7 +3257,7 @@ static int do_shared_fault(struct vm_fault *vmf, pgoff_t pgoff) int dirtied = 0; int ret, tmp; - ret = __do_fault(vmf, pgoff, NULL, &fault_page, NULL); + ret = __do_fault(vmf, NULL, &fault_page, NULL); if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))) return ret; @@ -3317,16 +3318,15 @@ static int do_shared_fault(struct vm_fault *vmf, pgoff_t pgoff) static int do_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; - pgoff_t pgoff = linear_page_index(vma, vmf->address); /* The VMA was not fully populated on mmap() or missing VM_DONTEXPAND */ if (!vma->vm_ops->fault) return VM_FAULT_SIGBUS; if (!(vmf->flags & FAULT_FLAG_WRITE)) - return do_read_fault(vmf, pgoff); + return do_read_fault(vmf); if (!(vma->vm_flags & VM_SHARED)) - return do_cow_fault(vmf, pgoff); - return do_shared_fault(vmf, pgoff); + return do_cow_fault(vmf); + return do_shared_fault(vmf); } static int numa_migrate_prep(struct page *page, struct vm_area_struct *vma, @@ -3574,6 +3574,7 @@ static int __handle_mm_fault(struct vm_area_struct *vma, unsigned long address, .vma = vma, .address = address, .flags = flags, + .pgoff = linear_page_index(vma, address), }; struct mm_struct *mm = vma->vm_mm; pgd_t *pgd;