From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754562Ab3JBOgt (ORCPT ); Wed, 2 Oct 2013 10:36:49 -0400 Received: from cantor2.suse.de ([195.135.220.15]:48984 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752949Ab3JBO25 (ORCPT ); Wed, 2 Oct 2013 10:28:57 -0400 From: Jan Kara To: LKML Cc: linux-mm@kvack.org, Jan Kara , linux-scsi@vger.kernel.org, Kai Makisara Subject: [PATCH 07/26] st: Convert sgl_map_user_pages() to use get_user_pages_fast() Date: Wed, 2 Oct 2013 16:27:48 +0200 Message-Id: <1380724087-13927-8-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> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org CC: linux-scsi@vger.kernel.org CC: Kai Makisara Signed-off-by: Jan Kara --- drivers/scsi/st.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index ff44b3c2cff2..ba11299c3740 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4514,19 +4514,11 @@ static int sgl_map_user_pages(struct st_buffer *STbp, if ((pages = kmalloc(max_pages * sizeof(*pages), GFP_KERNEL)) == NULL) return -ENOMEM; - /* Try to fault in all of the necessary pages */ - down_read(¤t->mm->mmap_sem); - /* rw==READ means read from drive, write into memory area */ - res = get_user_pages( - current, - current->mm, - uaddr, - nr_pages, - rw == READ, - 0, /* don't force */ - pages, - NULL); - up_read(¤t->mm->mmap_sem); + /* + * Try to fault in all of the necessary pages. rw==READ means read + * from drive, write into memory area. + */ + res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); /* Errors and no page mapped should return here */ if (res < nr_pages) -- 1.8.1.4