kernel: add roundup() code comment from akpm
Add roundup() code comment from akpm.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index b526947..3f648d2 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -58,6 +58,8 @@
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+
+/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
#define roundup(x, y) ( \
{ \
const typeof(y) __y = y; \