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| author | Eric Anholt <eric@anholt.net> | 2008-08-21 12:53:33 -0700 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2008-10-18 07:10:12 +1000 |
| commit | d1d8c925b71dd6753bf438f9e14a9e5c5183bcc6 (patch) | |
| tree | ea0669efa2f70ba8559d644e21b0356b1cba2458 /arch | |
| parent | 395e0ddc44005ced5e4fed9bfc2e4bdf63d37627 (diff) | |
| download | kernel_samsung_smdk4412-d1d8c925b71dd6753bf438f9e14a9e5c5183bcc6.zip kernel_samsung_smdk4412-d1d8c925b71dd6753bf438f9e14a9e5c5183bcc6.tar.gz kernel_samsung_smdk4412-d1d8c925b71dd6753bf438f9e14a9e5c5183bcc6.tar.bz2 | |
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>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/highmem_32.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c index 165c871..bcc079c 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_GPL(kmap_atomic_pfn); /* temporarily in use by i915 GEM until vmap */ struct page *kmap_atomic_to_page(void *ptr) { |