From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f172.google.com (mail-pd0-f172.google.com [209.85.192.172]) by kanga.kvack.org (Postfix) with ESMTP id 4260C6B0031 for ; Wed, 2 Oct 2013 10:29:00 -0400 (EDT) Received: by mail-pd0-f172.google.com with SMTP id z10so956322pdj.3 for ; Wed, 02 Oct 2013 07:28:59 -0700 (PDT) From: Jan Kara Subject: [PATCH 03/26] dma: Use get_user_pages_fast() in dma_pin_iovec_pages() Date: Wed, 2 Oct 2013 16:27:44 +0200 Message-Id: <1380724087-13927-4-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 , Dan Williams CC: Dan Williams Signed-off-by: Jan Kara --- drivers/dma/iovlock.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c index bb48a57c2fc1..8b16332da8a9 100644 --- a/drivers/dma/iovlock.c +++ b/drivers/dma/iovlock.c @@ -95,17 +95,10 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) pages += page_list->nr_pages; /* pin pages down */ - down_read(¤t->mm->mmap_sem); - ret = get_user_pages( - current, - current->mm, - (unsigned long) iov[i].iov_base, - page_list->nr_pages, - 1, /* write */ - 0, /* force */ - page_list->pages, - NULL); - up_read(¤t->mm->mmap_sem); + ret = get_user_pages_fast((unsigned long) iov[i].iov_base, + page_list->nr_pages, + 1, /* write */ + page_list->pages); if (ret != page_list->nr_pages) goto unpin; -- 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