From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753133AbeEOSFl (ORCPT ); Tue, 15 May 2018 14:05:41 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:33864 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752971AbeEOSFh (ORCPT ); Tue, 15 May 2018 14:05:37 -0400 From: Christoph Hellwig To: Konrad Rzeszutek Wilk Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/6] swiotlb: remove a pointless comment Date: Tue, 15 May 2018 20:05:18 +0200 Message-Id: <20180515180523.3038-2-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180515180523.3038-1-hch@lst.de> References: <20180515180523.3038-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This comments describes an aspect of the map_sg interface that isn't even exploited by swiotlb. Signed-off-by: Christoph Hellwig --- lib/swiotlb.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 16ace0e25d52..721f93677eee 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -927,12 +927,6 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, * appropriate dma address and length. They are obtained via * sg_dma_{address,length}(SG). * - * NOTE: An implementation may be able to use a smaller number of - * DMA address/length pairs than there are SG table elements. - * (for example via virtual mapping capabilities) - * The routine returns the number of addr/length pairs actually - * used, at most nents. - * * Device ownership issues as mentioned above for swiotlb_map_page are the * same here. */ -- 2.17.0