From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f44.google.com (mail-pb0-f44.google.com [209.85.160.44]) by kanga.kvack.org (Postfix) with ESMTP id CD6DA6B0038 for ; Wed, 2 Oct 2013 10:29:02 -0400 (EDT) Received: by mail-pb0-f44.google.com with SMTP id xa7so949402pbc.31 for ; Wed, 02 Oct 2013 07:29:02 -0700 (PDT) From: Jan Kara Subject: [PATCH 16/26] mm: Provide get_user_pages_unlocked() Date: Wed, 2 Oct 2013 16:27:57 +0200 Message-Id: <1380724087-13927-17-git-send-email-jack@suse.cz> In-Reply-To: <1380724087-13927-1-git-send-email-jack@suse.cz> References: <1380724087-13927-1-git-send-email-jack@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: LKML Cc: linux-mm@kvack.org, Jan Kara Provide a wrapper for get_user_pages() which takes care of acquiring and releasing mmap_sem. Using this function reduces amount of places in which we deal with mmap_sem. Signed-off-by: Jan Kara --- include/linux/mm.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 8b6e55ee8855..70031ead06a5 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1031,6 +1031,20 @@ long get_user_pages(struct task_struct *tsk, struct mm_struct *mm, struct vm_area_struct **vmas); int get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **pages); +static inline long +get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, + unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages) +{ + long ret; + + down_read(&mm->mmap_sem); + ret = get_user_pages(tsk, mm, start, nr_pages, write, force, pages, + NULL); + up_read(&mm->mmap_sem); + return ret; +} + struct kvec; int get_kernel_pages(const struct kvec *iov, int nr_pages, int write, struct page **pages); -- 1.8.1.4 -- 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