It will be more readable and safer than the old setting.

Signed-off-by: Baoquan He <b...@redhat.com>
---
 drivers/iommu/amd_iommu_init.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 59741ea..3e810c6 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -20,6 +20,7 @@
 #include <linux/pci.h>
 #include <linux/acpi.h>
 #include <linux/list.h>
+#include <linux/bitmap.h>
 #include <linux/slab.h>
 #include <linux/syscore_ops.h>
 #include <linux/interrupt.h>
@@ -2136,7 +2137,7 @@ static int __init early_amd_iommu_init(void)
         * never allocate domain 0 because its used as the non-allocated and
         * error value placeholder
         */
-       amd_iommu_pd_alloc_bitmap[0] = 1;
+       __set_bit(0, amd_iommu_pd_alloc_bitmap);
 
        spin_lock_init(&amd_iommu_pd_lock);
 
-- 
2.5.5

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