x86: move dma_unmap_sg to common header

i386 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 24741525901c..920530438d8c 100644
--- a/arch/x86/kernel/pci-base_32.c
+++ b/arch/x86/kernel/pci-base_32.c
@@ -34,6 +34,7 @@ static const struct dma_mapping_ops pci32_dma_ops = {
         .map_single = pci32_map_single,
         .unmap_single = NULL,
         .map_sg = pci32_dma_map_sg,
+        .unmap_sg = NULL,
 };
 
 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;