diff options
Diffstat (limited to 'meta-moblin/packages/linux/linux-moblin-2.6.27/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch')
| -rw-r--r-- | meta-moblin/packages/linux/linux-moblin-2.6.27/0013-Export-kmap_atomic_pfn-for-DRM-GEM.patch | 24 |
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) + { |