blob: cc90d4626212d0bf801d353588036b1a45499826 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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)
{
|
