From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753551AbYHZToR (ORCPT ); Tue, 26 Aug 2008 15:44:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755842AbYHZTn7 (ORCPT ); Tue, 26 Aug 2008 15:43:59 -0400 Received: from 69-30-77-85.dq1sn.easystreet.com ([69.30.77.85]:49633 "EHLO camus.anholt.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755735AbYHZTn6 (ORCPT ); Tue, 26 Aug 2008 15:43:58 -0400 From: Eric Anholt To: linux-kernel@vger.kernel.org Cc: Eric Anholt Subject: [PATCH] Export kmap_atomic_pfn for DRM-GEM. Date: Tue, 26 Aug 2008 12:43:08 -0700 Message-Id: <1219779789-8368-3-git-send-email-eric@anholt.net> X-Mailer: git-send-email 1.5.6.3 In-Reply-To: <1219779789-8368-2-git-send-email-eric@anholt.net> References: <1219779789-8368-1-git-send-email-eric@anholt.net> <1219779789-8368-2-git-send-email-eric@anholt.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The driver would like to map IO space directly for copying data in when appropriate, to avoid CPU cache flushing for streaming writes. kmap_atomic_pfn lets us avoid IPIs associated with ioremap for this process. Signed-off-by: Eric Anholt --- arch/x86/mm/highmem_32.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c index 165c871..d52e91d 100644 --- a/arch/x86/mm/highmem_32.c +++ b/arch/x86/mm/highmem_32.c @@ -137,6 +137,7 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) return (void*) vaddr; } +EXPORT_SYMBOL(kmap_atomic_pfn); struct page *kmap_atomic_to_page(void *ptr) { -- 1.5.6.3