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authorSamuel Ortiz <sameo@openedhand.com>2008-10-09 17:00:45 +0000
committerSamuel Ortiz <sameo@openedhand.com>2008-10-09 17:00:45 +0000
commitd89d52d3ec86cf95dd93bb78c9b0ab537200e180 (patch)
treeac2667cd2ffa466be3f333c032045b9e3a8805d2 /meta/packages/linux/linux-moblin-2.6.27-rc6/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch
parent3d40acdf3e5e6d7da75862fa309b58f0d555141a (diff)
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linux-moblin: 2.6.27-rc6 kernel
That includes the fastboot patches. An eee boots in 10s with that kernel. git-svn-id: https://svn.o-hand.com/repos/poky/trunk@5470 311d38ba-8fff-0310-9ca6-ca027cbcb966
Diffstat (limited to 'meta/packages/linux/linux-moblin-2.6.27-rc6/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch')
-rw-r--r--meta/packages/linux/linux-moblin-2.6.27-rc6/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch24
1 files changed, 24 insertions, 0 deletions
diff --git a/meta/packages/linux/linux-moblin-2.6.27-rc6/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch b/meta/packages/linux/linux-moblin-2.6.27-rc6/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch
new file mode 100644
index 000000000..cc90d4626
--- /dev/null
+++ b/meta/packages/linux/linux-moblin-2.6.27-rc6/0013-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)
+ {