[SPARC64]: Use "is_power_of_2" macro for simplicity.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/asm-sparc64/vio.h b/include/asm-sparc64/vio.h
index f7417e9..d4de32f 100644 (file)
--- a/include/asm-sparc64/vio.h
+++ b/include/asm-sparc64/vio.h
@@ -8,6 +8,7 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/list.h>
+#include <linux/log2.h>
 
 #include <asm/ldc.h>
 #include <asm/mdesc.h>
@@ -257,8 +258,7 @@ static inline void *vio_dring_entry(struct vio_dring_state *dr,
 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
                                  unsigned int ring_size)
 {
-       /* Ensure build-time power-of-2.  */
-       BUILD_BUG_ON(ring_size & (ring_size - 1));
+       BUILD_BUG_ON(!is_power_of_2(ring_size));
 
        return (dr->pending -
                ((dr->prod - dr->cons) & (ring_size - 1)));