Marking BUG() unreachable helps us silence unnecessary warnings e.g.
"warning: control reaches end of non-void function [-Wreturn-type]" like
the code below.
int foo()
{
...
if (XXX)
return 0;
else if (YYY)
return 1;
else
BUG();
}
Signed-off-by: Naohiro Aota <naohiro.a...@wdc.com>
---
kerncompat.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kerncompat.h b/kerncompat.h
index 01fd93a7b540..7060326fe4f4 100644
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -333,7 +333,11 @@ static inline void assert_trace(const char *assertion,
const char *filename,
#endif
#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
-#define BUG() BUG_ON(1)
+#define BUG() \
+do { \
+ BUG_ON(1); \
+ __builtin_unreachable(); \
+} while (0)
#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
#define container_of(ptr, type, member) ({ \
--
2.31.1
