x86: Add flush_write_buffers in nommu functions

This patch adds flush_write_buffers() in some functions of pci-nommu_64.c
They are added anywhere i386 would also have it. This is not a problem
for x86_64, since flush_rite_buffers() an nop for it.

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

diff --git a/arch/x86/kernel/pci-nommu_64.c b/arch/x86/kernel/pci-nommu_64.c
index a4e8ccf..1da9cf9 100644 (file)
--- a/arch/x86/kernel/pci-nommu_64.c
+++ b/arch/x86/kernel/pci-nommu_64.c
@@ -32,6 +32,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
        dma_addr_t bus = paddr;
        if (!check_addr("map_single", hwdev, bus, size))
                                return bad_dma_address;
+       flush_write_buffers();
        return bus;
 }
 
@@ -64,6 +65,7 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
                        return 0;
                s->dma_length = s->length;
        }
+       flush_write_buffers();
        return nents;
 }