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GET /api/patches/806273/?format=api
{ "id": 806273, "url": "http://patchwork.ozlabs.org/api/patches/806273/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170827161032.22772-11-hch@lst.de/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20170827161032.22772-11-hch@lst.de>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20170827161032.22772-11-hch@lst.de/", "date": "2017-08-27T16:10:30", "name": "[10/12] xtensa: make dma_cache_sync a no-op", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "8538f51abac315f137fa84d7c75fa3048257aa66", "submitter": { "id": 82, "url": "http://patchwork.ozlabs.org/api/people/82/?format=api", "name": "Christoph Hellwig", "email": "hch@lst.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170827161032.22772-11-hch@lst.de/mbox/", "series": [ { "id": 29, "url": "http://patchwork.ozlabs.org/api/series/29/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=29", "date": "2017-08-27T16:10:24", "name": "[01/12] floppy: consolidate the dummy fd_cacheflush definition", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/29/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/806273/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/806273/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xgL4S1M28z9sD9\n\tfor <patchwork-incoming@ozlabs.org>;\n\tMon, 28 Aug 2017 02:31:04 +1000 (AEST)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xgL4S09HmzDqG2\n\tfor <patchwork-incoming@ozlabs.org>;\n\tMon, 28 Aug 2017 02:31:04 +1000 (AEST)", "from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xgKdS4H0MzDqjP\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tMon, 28 Aug 2017 02:11:08 +1000 (AEST)", "from clnet-p099-196.ikbnet.co.at ([83.175.99.196] helo=localhost)\n\tby bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat\n\tLinux)) id 1dm09O-0006tz-2g; Sun, 27 Aug 2017 16:11:02 +0000" ], "Authentication-Results": [ "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=infradead.org header.i=@infradead.org\n\theader.b=\"Q72jTQ+l\"; dkim-atps=neutral", "lists.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=infradead.org header.i=@infradead.org\n\theader.b=\"Q72jTQ+l\"; dkim-atps=neutral", "lists.ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=infradead.org header.i=@infradead.org\n\theader.b=\"Q72jTQ+l\"; dkim-atps=neutral" ], "DKIM-Signature": "v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=infradead.org; s=bombadil.20170209;\n\th=References:In-Reply-To:Message-Id:\n\tDate:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type:\n\tContent-Transfer-Encoding:Content-ID:Content-Description:Resent-Date:\n\tResent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:\n\tList-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;\n\tbh=kgNysyjYcPnDRwL3fNO+ZZ6QEX1wS5LsiSP4LsCn9F0=;\n\tb=Q72jTQ+llCfRCDtvJn+03HqT7\n\t2gbXxlSVVceE4/9NJNYFXSHTAsdnrMYu6nHrAmatg3eSYqYCFt2uACqru11PQcFjQzFYMpq6FEnJs\n\tzh9K3N/KBxn1oUK42vUH6jTfsYuW3R9PBbfitWPHTUiT76ExeNDYjWntjnXAISEbZO2niVuIicjTM\n\tOzoq3LgnXHKCieSqIp0GKk5rju7TfKpx2F877kQ5pSccyd6+pPkVUNWRt5EIKmnL3oLegBQ7VZSZF\n\tARDPyw9Mmx3NDOrTuCRAZd9EacdcQunDUx3miPAkc6TzaAaQPHlUmmHHLwSj3QJUFmYLUAiYRq3rE\n\t+kpo8eDDg==;", "From": "Christoph Hellwig <hch@lst.de>", "To": "iommu@lists.linux-foundation.org", "Subject": "[PATCH 10/12] xtensa: make dma_cache_sync a no-op", "Date": "Sun, 27 Aug 2017 18:10:30 +0200", "Message-Id": "<20170827161032.22772-11-hch@lst.de>", "X-Mailer": "git-send-email 2.11.0", "In-Reply-To": "<20170827161032.22772-1-hch@lst.de>", "References": "<20170827161032.22772-1-hch@lst.de>", "X-SRS-Rewrite": "SMTP reverse-path rewritten from <hch@infradead.org> by\n\tbombadil.infradead.org. See http://www.infradead.org/rpr.html", "X-BeenThere": "linuxppc-dev@lists.ozlabs.org", "X-Mailman-Version": "2.1.23", "Precedence": "list", "List-Id": "Linux on PowerPC Developers Mail List\n\t<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "Cc": "Chris Zankel <chris@zankel.net>, Michal Simek <monstr@monstr.eu>,\n\tlinux-ia64@vger.kernel.org, linux-mips@linux-mips.org,\n\tlinux-sh@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,\n\tlinux-xtensa@linux-xtensa.org, x86@kernel.org,\n\tlinux-kernel@vger.kernel.org, \n\tDavid Howells <dhowells@redhat.com>, Max Filippov <jcmvbkbc@gmail.com>,\n\tGuan Xuetao <gxt@mprc.pku.edu.cn>, Robin Murphy <robin.murphy@arm.com>,\n\tMarek Szyprowski <m.szyprowski@samsung.com>", "Errors-To": "linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org", "Sender": "\"Linuxppc-dev\"\n\t<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "xtensa does not implement DMA_ATTR_NON_CONSISTENT allocations, so it\ndoesn't make any sense to do any work in dma_cache_sync given that it\nmust be a no-op when dma_alloc_attrs returns coherent memory.\n\nSigned-off-by: Christoph Hellwig <hch@lst.de>\n---\n arch/xtensa/include/asm/dma-mapping.h | 6 ++++--\n arch/xtensa/kernel/pci-dma.c | 23 -----------------------\n 2 files changed, 4 insertions(+), 25 deletions(-)", "diff": "diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h\nindex 269738dc9d1d..353e0314d6ba 100644\n--- a/arch/xtensa/include/asm/dma-mapping.h\n+++ b/arch/xtensa/include/asm/dma-mapping.h\n@@ -23,8 +23,10 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)\n \treturn &xtensa_dma_map_ops;\n }\n \n-void dma_cache_sync(struct device *dev, void *vaddr, size_t size,\n-\t\t enum dma_data_direction direction);\n+static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,\n+\t\t enum dma_data_direction direction)\n+{\n+}\n \n static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)\n {\ndiff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c\nindex cec86a1c2acc..623720a11143 100644\n--- a/arch/xtensa/kernel/pci-dma.c\n+++ b/arch/xtensa/kernel/pci-dma.c\n@@ -26,29 +26,6 @@\n #include <asm/cacheflush.h>\n #include <asm/io.h>\n \n-void dma_cache_sync(struct device *dev, void *vaddr, size_t size,\n-\t\t enum dma_data_direction dir)\n-{\n-\tswitch (dir) {\n-\tcase DMA_BIDIRECTIONAL:\n-\t\t__flush_invalidate_dcache_range((unsigned long)vaddr, size);\n-\t\tbreak;\n-\n-\tcase DMA_FROM_DEVICE:\n-\t\t__invalidate_dcache_range((unsigned long)vaddr, size);\n-\t\tbreak;\n-\n-\tcase DMA_TO_DEVICE:\n-\t\t__flush_dcache_range((unsigned long)vaddr, size);\n-\t\tbreak;\n-\n-\tcase DMA_NONE:\n-\t\tBUG();\n-\t\tbreak;\n-\t}\n-}\n-EXPORT_SYMBOL(dma_cache_sync);\n-\n static void do_cache_op(dma_addr_t dma_handle, size_t size,\n \t\t\tvoid (*fn)(unsigned long, unsigned long))\n {\n", "prefixes": [ "10/12" ] }