From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753551Ab3JBO3G (ORCPT ); Wed, 2 Oct 2013 10:29:06 -0400 Received: from cantor2.suse.de ([195.135.220.15]:48975 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752927Ab3JBO25 (ORCPT ); Wed, 2 Oct 2013 10:28:57 -0400 From: Jan Kara To: LKML Cc: linux-mm@kvack.org, Jan Kara , Dan Williams 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> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1380724087-13927-1-git-send-email-jack@suse.cz> References: <1380724087-13927-1-git-send-email-jack@suse.cz> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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