From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f71.google.com (mail-wm0-f71.google.com [74.125.82.71]) by kanga.kvack.org (Postfix) with ESMTP id 8329728028D for ; Tue, 27 Sep 2016 12:08:41 -0400 (EDT) Received: by mail-wm0-f71.google.com with SMTP id l132so12165780wmf.0 for ; Tue, 27 Sep 2016 09:08:41 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id bi8si3068916wjb.3.2016.09.27.09.08.34 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 27 Sep 2016 09:08:34 -0700 (PDT) From: Jan Kara Subject: [PATCH 17/20] mm: Export follow_pte() Date: Tue, 27 Sep 2016 18:08:21 +0200 Message-Id: <1474992504-20133-18-git-send-email-jack@suse.cz> In-Reply-To: <1474992504-20133-1-git-send-email-jack@suse.cz> References: <1474992504-20133-1-git-send-email-jack@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: 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 DAX will need to implement its own version of page_check_address(). To avoid duplicating page table walking code, export follow_pte() which does what we need. Signed-off-by: Jan Kara --- include/linux/mm.h | 2 ++ mm/memory.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index e5a014be8932..133fabe4bb4c 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1224,6 +1224,8 @@ int copy_page_range(struct mm_struct *dst, struct mm_struct *src, struct vm_area_struct *vma); void unmap_mapping_range(struct address_space *mapping, loff_t const holebegin, loff_t const holelen, int even_cows); +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, + spinlock_t **ptlp); int follow_pfn(struct vm_area_struct *vma, unsigned long address, unsigned long *pfn); int follow_phys(struct vm_area_struct *vma, unsigned long address, diff --git a/mm/memory.c b/mm/memory.c index 8c8cb7f2133e..e7a4a30a5e88 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3763,8 +3763,8 @@ out: return -EINVAL; } -static inline int follow_pte(struct mm_struct *mm, unsigned long address, - pte_t **ptepp, spinlock_t **ptlp) +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, + spinlock_t **ptlp) { int res; -- 2.6.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org