[POWERPC] Add "is_power_of_2" checking to log2.h.

Add the inline function "is_power_of_2()" to log2.h, where the value
zero is *not* considered to be a power of two.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/arch/ppc/syslib/ppc85xx_rio.c b/arch/ppc/syslib/ppc85xx_rio.c
index 05b0e9415085..2b097800cdd9 100644
--- a/arch/ppc/syslib/ppc85xx_rio.c
+++ b/arch/ppc/syslib/ppc85xx_rio.c
@@ -59,8 +59,6 @@
 #define DBELL_TID(x)            (*(u8 *)(x + DOORBELL_TID_OFFSET))
 #define DBELL_INF(x)            (*(u16 *)(x + DOORBELL_INFO_OFFSET))
 
-#define is_power_of_2(x)        (((x) & ((x) - 1)) == 0)
-
 struct rio_atmu_regs {
         u32 rowtar;
         u32 pad1;