From patchwork Wed Sep 9 03:18:17 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Bottomley X-Patchwork-Id: 46313 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n893IqVD020687 for ; Wed, 9 Sep 2009 03:18:52 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752673AbZIIDSZ (ORCPT ); Tue, 8 Sep 2009 23:18:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752689AbZIIDSZ (ORCPT ); Tue, 8 Sep 2009 23:18:25 -0400 Received: from cantor.suse.de ([195.135.220.2]:33453 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752673AbZIIDSX (ORCPT ); Tue, 8 Sep 2009 23:18:23 -0400 Received: from relay1.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.suse.de (Postfix) with ESMTP id 5B4C76CB00; Wed, 9 Sep 2009 05:18:26 +0200 (CEST) Subject: [PATCH 2/5] parisc: add mm API for DMA to vmalloc/vmap areas From: James Bottomley To: Russell King Cc: Parisc List , Linux Filesystem Mailing List , linux-arch@vger.kernel.org, Christoph Hellwig In-Reply-To: <1252466070.13003.365.camel@mulgrave.site> References: <1252434469.13003.3.camel@mulgrave.site> <20090908190031.GF6538@flint.arm.linux.org.uk> <1252437112.13003.39.camel@mulgrave.site> <20090908201619.GG6538@flint.arm.linux.org.uk> <1252442352.13003.132.camel@mulgrave.site> <20090908213910.GH6538@flint.arm.linux.org.uk> <1252466070.13003.365.camel@mulgrave.site> Date: Wed, 09 Sep 2009 03:18:17 +0000 Message-Id: <1252466297.13003.369.camel@mulgrave.site> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org We already have an API to flush a kernel page along an alias address, so use it. The TLB purge prevents the CPU from doing speculative moveins on the flushed address, so we don't need to implement and invalidate. Signed-off-by: James Bottomley --- arch/parisc/include/asm/cacheflush.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h index 7243951..2536a00 100644 --- a/arch/parisc/include/asm/cacheflush.h +++ b/arch/parisc/include/asm/cacheflush.h @@ -90,6 +90,14 @@ static inline void flush_kernel_dcache_page(struct page *page) { flush_kernel_dcache_page_addr(page_address(page)); } +static inline void flush_kernel_dcache_addr(void *addr) +{ + flush_kernel_dcache_page_addr(addr); +} +static inline void invalidate_kernel_dcache_addr(void *addr) +{ + /* nop .. the flush prevents move in until the page is touched */ +} #ifdef CONFIG_DEBUG_RODATA void mark_rodata_ro(void);