From: Eric Anholt <eric@anholt.net>
Date: Thu, 21 Aug 2008 19:53:33 +0000 (-0700)
Subject: Export kmap_atomic_pfn for DRM-GEM.
X-Git-Tag: v2.6.28-rc1~255^2~25
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=d1d8c925b71dd6753bf438f9e14a9e5c5183bcc6;p=linux-2.6-omap-h63xx.git

Export kmap_atomic_pfn for DRM-GEM.

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 <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index 165c871ba9a..bcc079c282d 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_GPL(kmap_atomic_pfn); /* temporarily in use by i915 GEM until vmap */
 
 struct page *kmap_atomic_to_page(void *ptr)
 {