Use attribute availability.
Bug: http://b/21952040
Change-Id: I3998d88bc6076d60ae5cf7efd112817f80f17971
diff --git a/libc/include/sys/stat.h b/libc/include/sys/stat.h
index c22516f..65aa190 100644
--- a/libc/include/sys/stat.h
+++ b/libc/include/sys/stat.h
@@ -171,7 +171,7 @@
}
#endif /* defined(__BIONIC_FORTIFY) */
-_BIONIC_NOT_BEFORE_21(extern int mkfifo(const char*, mode_t);)
+extern int mkfifo(const char*, mode_t) __INTRODUCED_IN(21);
extern int mkfifoat(int, const char*, mode_t);
extern int fchmodat(int, const char*, mode_t, int);