[PATCH] NFS: large non-page-aligned direct I/O clobbers memory

[powerpc.git] / include / asm-generic / bug.h

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 0cd9711..8ceab7b 100644 (file)
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -38,4 +38,23 @@
 #endif
 #endif
 
+#define WARN_ON_ONCE(condition)                                \
+({                                                     \
+       static int __warn_once = 1;                     \
+       int __ret = 0;                                  \
+                                                       \
+       if (unlikely((condition) && __warn_once)) {     \
+               __warn_once = 0;                        \
+               WARN_ON(1);                             \
+               __ret = 1;                              \
+       }                                               \
+       __ret;                                          \
+})
+
+#ifdef CONFIG_SMP
+# define WARN_ON_SMP(x)                        WARN_ON(x)
+#else
+# define WARN_ON_SMP(x)                        do { } while (0)
+#endif
+
 #endif