1 files changed, 24 insertions, 0 deletions

diff --git a/meta-moblin/packages/linux/linux-moblin-2.6.27/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch b/meta-moblin/packages/linux/linux-moblin-2.6.27/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch
new file mode 100644
index 0000000000..cc90d46262
--- /dev/null
+++ b/meta-moblin/packages/linux/linux-moblin-2.6.27/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch
@@ -0,0 +1,24 @@
+commit 25eaa97fc74b225e13cf11ed8d770192ddc9355d
+Author: Eric Anholt <eric@anholt.net>
+Date:   Thu Aug 21 12:53:33 2008 -0700
+
+    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>
+
+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)
+ {