LU-15492 build: fallthrough macro for pre/post gcc-7

[fs/lustre-release.git] / lustre / include / lustre_compat.h

diff --git a/lustre/include/lustre_compat.h b/lustre/include/lustre_compat.h
index ccd0960..6338b52 100644 (file)
--- a/lustre/include/lustre_compat.h
+++ b/lustre/include/lustre_compat.h
@@ -600,7 +600,11 @@ static inline bool is_root_inode(struct inode *inode)
 #endif
 
 #ifndef fallthrough
-#define fallthrough do {} while (0)  /* fallthrough */
+# if defined(__GNUC__) && __GNUC__ >= 7
+#  define fallthrough  __attribute__((fallthrough)) /* fallthrough */
+# else
+#  define fallthrough do {} while (0)  /* fallthrough */
+# endif
 #endif
 
 static inline void ll_security_release_secctx(char *secdata, u32 seclen)