x86: move dma_unmap_single to common header

i386 base does not need it, so it gets an empty function.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c
index b613d735f76c..a8a7c7f2d23f 100644
--- a/arch/x86/kernel/pci-base_32.c
+++ b/arch/x86/kernel/pci-base_32.c
@@ -14,6 +14,7 @@ static dma_addr_t pci32_map_single(struct device *dev, void *ptr,
 
 static const struct dma_mapping_ops pci32_dma_ops = {
         .map_single = pci32_map_single,
+        .unmap_single = NULL,
 };
 
 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;