#define __used __attribute__((__used__))
#define __must_check __attribute__((warn_unused_result))
#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
-#define __always_inline inline __attribute__((always_inline))
+#ifndef __always_inline
+# define __always_inline inline __attribute__((always_inline))
+#endif
/*
* A trick to suppress uninitialized variable warning without generating any