From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f169.google.com (mail-wi0-f169.google.com [209.85.212.169]) by kanga.kvack.org (Postfix) with ESMTP id 8BE6D82F6F for ; Tue, 6 Oct 2015 05:25:05 -0400 (EDT) Received: by wicfx3 with SMTP id fx3so149734827wic.0 for ; Tue, 06 Oct 2015 02:25:05 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id fd7si36837694wjc.157.2015.10.06.02.24.53 for (version=TLS1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 06 Oct 2015 02:24:53 -0700 (PDT) From: Jan Kara Subject: [PATCH 7/7] [media] ivtv: Convert to get_user_pages_unlocked() Date: Tue, 6 Oct 2015 11:24:30 +0200 Message-Id: <1444123470-4932-8-git-send-email-jack@suse.com> In-Reply-To: <1444123470-4932-1-git-send-email-jack@suse.com> References: <1444123470-4932-1-git-send-email-jack@suse.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Jan Kara , Andy Walls , Mauro Carvalho Chehab , linux-media@vger.kernel.org From: Jan Kara Convert ivtv_yuv_prep_user_dma() to use get_user_pages_unlocked() so that we don't unnecessarily leak knowledge about mm locking into drivers code. CC: Andy Walls CC: Mauro Carvalho Chehab CC: linux-media@vger.kernel.org Signed-off-by: Jan Kara --- drivers/media/pci/ivtv/ivtv-yuv.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/media/pci/ivtv/ivtv-yuv.c b/drivers/media/pci/ivtv/ivtv-yuv.c index 2ad65eb29832..2b8e7b2f2b86 100644 --- a/drivers/media/pci/ivtv/ivtv-yuv.c +++ b/drivers/media/pci/ivtv/ivtv-yuv.c @@ -75,15 +75,15 @@ static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma, ivtv_udma_get_page_info (&uv_dma, (unsigned long)args->uv_source, 360 * uv_decode_height); /* Get user pages for DMA Xfer */ - down_read(¤t->mm->mmap_sem); - y_pages = get_user_pages(current, current->mm, y_dma.uaddr, y_dma.page_count, 0, 1, &dma->map[0], NULL); + y_pages = get_user_pages_unlocked(current, current->mm, + y_dma.uaddr, y_dma.page_count, 0, 1, + &dma->map[0]); uv_pages = 0; /* silence gcc. value is set and consumed only if: */ if (y_pages == y_dma.page_count) { - uv_pages = get_user_pages(current, current->mm, - uv_dma.uaddr, uv_dma.page_count, 0, 1, - &dma->map[y_pages], NULL); + uv_pages = get_user_pages_unlocked(current, current->mm, + uv_dma.uaddr, uv_dma.page_count, 0, 1, + &dma->map[y_pages]); } - up_read(¤t->mm->mmap_sem); if (y_pages != y_dma.page_count || uv_pages != uv_dma.page_count) { int rc = -EFAULT; -- 2.1.4 -- 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