1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c
index 70117df4d067..e72a83e2bad5 100644
--- a/drivers/char/agp/i460-agp.c
+++ b/drivers/char/agp/i460-agp.c
@@ -13,6 +13,7 @@
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/agp_backend.h>
+#include <linux/log2.h>
 
 #include "agp.h"
 
@@ -59,8 +60,6 @@
  */
 #define WR_FLUSH_GATT(index)    RD_GATT(index)
 
-#define log2(x)                 ffz(~(x))
-
 static struct {
         void *gatt;                             /* ioremap'd GATT area */
 
@@ -148,7 +147,7 @@ static int i460_fetch_size (void)
                  * values[i].size.
                  */
                 values[i].num_entries = (values[i].size << 8) >> (I460_IO_PAGE_SHIFT - 12);
-                values[i].page_order = log2((sizeof(u32)*values[i].num_entries) >> PAGE_SHIFT);
+                values[i].page_order = ilog2((sizeof(u32)*values[i].num_entries) >> PAGE_SHIFT);
         }
 
         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {