Merge remote-tracking branch 'usb.current/usb-linus'

[karo-tx-linux.git] / include / linux / bug.h

diff --git a/include/linux/bug.h b/include/linux/bug.h
index 72961c39576a4af5eb68a45f6bebc18e88935d2e..aaac4bba6f5c7faa1d2b95b13983323658c8188c 100644 (file)
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -30,6 +30,13 @@ struct pt_regs;
 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
 #define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
 
+/*
+ * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the
+ * expression but avoids the generation of any code, even if that expression
+ * has side-effects.
+ */
+#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
+
 /**
  * BUILD_BUG_ON - break compile if a condition is true.
  * @condition: the condition which the compiler should know is false.