Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...

[linux-2.6] / include / linux / kernel.h

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 3c5e4c2e517dd8aa867336c2bc70c560f510f556..181c69cad4e3a45dca58bd6c50c2ae3d3e95f5b1 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -32,6 +32,8 @@ extern const char linux_banner[];
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 #define ALIGN(x,a) (((x)+(a)-1)&~((a)-1))
+#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
+#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
 
 #define        KERN_EMERG      "<0>"   /* system is unusable                   */
 #define        KERN_ALERT      "<1>"   /* action must be taken immediately     */
@@ -336,6 +338,12 @@ struct sysinfo {
 /* Force a compilation error if condition is true */
 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
 
+/* Force a compilation error if condition is true, but also produce a
+   result (of value 0 and type size_t), so the expression can be used
+   e.g. in a structure initializer (or where-ever else comma expressions
+   aren't permitted). */
+#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
+
 /* Trap pasters of __FUNCTION__ at compile-time */
 #define __FUNCTION__ (__func__)