X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=include%2Flinux%2Fbug.h;h=baff2e8fc8a82792045c3bb0112fb52cead7e6cb;hb=72b5d28ed8ab410cd029fc6e7536b904c0b9f4a0;hp=292d6a10b0c2683ecbd57858ca069e3dc0bb952e;hpb=5e10a8a0a7f312b7126a43b6b60a69a2d077c734;p=deliverable%2Flinux.git

diff --git a/include/linux/bug.h b/include/linux/bug.h
index 292d6a10b0c2..baff2e8fc8a8 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -121,4 +121,21 @@ static inline enum bug_trap_type report_bug(unsigned long bug_addr,
 }
 
 #endif	/* CONFIG_GENERIC_BUG */
+
+/*
+ * Since detected data corruption should stop operation on the affected
+ * structures, this returns false if the corruption condition is found.
+ */
+#define CHECK_DATA_CORRUPTION(condition, fmt, ...)			 \
+	do {								 \
+		if (unlikely(condition)) {				 \
+			if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
+				pr_err(fmt, ##__VA_ARGS__);		 \
+				BUG();					 \
+			} else						 \
+				WARN(1, fmt, ##__VA_ARGS__);		 \
+			return false;					 \
+		}							 \
+	} while (0)
+
 #endif	/* _LINUX_BUG_H */