25 lines
799 B
Diff
25 lines
799 B
Diff
commit 25eaa97fc74b225e13cf11ed8d770192ddc9355d
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Author: Eric Anholt <eric@anholt.net>
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Date: Thu Aug 21 12:53:33 2008 -0700
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Export kmap_atomic_pfn for DRM-GEM.
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The driver would like to map IO space directly for copying data in when
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appropriate, to avoid CPU cache flushing for streaming writes.
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kmap_atomic_pfn lets us avoid IPIs associated with ioremap for this process.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
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index 165c871..d52e91d 100644
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--- a/arch/x86/mm/highmem_32.c
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+++ b/arch/x86/mm/highmem_32.c
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@@ -137,6 +137,7 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
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return (void*) vaddr;
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}
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+EXPORT_SYMBOL(kmap_atomic_pfn);
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struct page *kmap_atomic_to_page(void *ptr)
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{
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