From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id 4D8CA6B02B5 for ; Fri, 4 Nov 2016 00:25:29 -0400 (EDT) Received: by mail-wm0-f70.google.com with SMTP id p190so8569950wmp.3 for ; Thu, 03 Nov 2016 21:25:29 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id l5si2900144wml.40.2016.11.03.21.25.28 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 03 Nov 2016 21:25:28 -0700 (PDT) From: Jan Kara Subject: [PATCH 18/21] mm: Export follow_pte() Date: Fri, 4 Nov 2016 05:25:14 +0100 Message-Id: <1478233517-3571-19-git-send-email-jack@suse.cz> In-Reply-To: <1478233517-3571-1-git-send-email-jack@suse.cz> References: <1478233517-3571-1-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, Andrew Morton , 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. Reviewed-by: Ross Zwisler 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 685ff1c57f2b..a5f52c0ce61a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1210,6 +1210,8 @@ 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 b3bd6b6c6472..7660f6169bee 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3782,8 +3782,8 @@ static int __follow_pte(struct mm_struct *mm, unsigned long address, 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