1 files changed, 2 insertions, 1 deletions

diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 6e7d1fe6e935..28c84e55feb9 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -7,6 +7,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/bootmem.h>
+#include <linux/log2.h>
 
 #include <asm/io.h>
 #include <asm/hwrpb.h>
@@ -53,7 +54,7 @@ size_for_memory(unsigned long max)
 {
         unsigned long mem = max_low_pfn << PAGE_SHIFT;
         if (mem < max)
-                max = 1UL << ceil_log2(mem);
+                max = roundup_pow_of_two(mem);
         return max;
 }