Avoid divide in IS_ALIGN

[deliverable/linux.git] / include / linux / kernel.h

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ff356b2ee478d3dd006e67a76427a467525df7ae..18222f267bc4043f0a0ff0be1201d58938f1063a 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -35,7 +35,7 @@ extern const char linux_proc_banner[];
 #define ALIGN(x,a)             __ALIGN_MASK(x,(typeof(x))(a)-1)
 #define __ALIGN_MASK(x,mask)   (((x)+(mask))&~(mask))
 #define PTR_ALIGN(p, a)                ((typeof(p))ALIGN((unsigned long)(p), (a)))
-#define IS_ALIGNED(x,a)                (((x) % ((typeof(x))(a))) == 0)
+#define IS_ALIGNED(x, a)               (((x) & ((typeof(x))(a) - 1)) == 0)
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))