X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=compiler%2Fcompiler.h;h=fefadeaa89fc5e4043d3024a98488f07fe9cbdb9;hp=8a784b9269b6a66419fc7f51cb453f047309653f;hb=9dc528b1638b625b5e167983a74de4e85c5859ea;hpb=f0ed01ed095cf1ca7c1945a5a0267e8f73b7b4a9

diff --git a/compiler/compiler.h b/compiler/compiler.h
index 8a784b92..fefadeaa 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -62,8 +62,19 @@
 #endif
 
 #ifdef FIO_INTERNAL
-#define ARRAY_SIZE(x)    (sizeof((x)) / (sizeof((x)[0])))
-#define FIELD_SIZE(s, f) (sizeof(((__typeof__(s))0)->f))
+#define FIO_ARRAY_SIZE(x)    (sizeof((x)) / (sizeof((x)[0])))
+#define FIO_FIELD_SIZE(s, f) (sizeof(((__typeof__(s))0)->f))
+#endif
+
+#ifndef __has_attribute
+#define __has_attribute(x) __GCC4_has_attribute_##x
+#define __GCC4_has_attribute___fallthrough__	0
+#endif
+
+#if __has_attribute(__fallthrough__)
+#define fio_fallthrough	 __attribute__((__fallthrough__))
+#else
+#define fio_fallthrough	do {} while (0)  /* fallthrough */
 #endif
 
 #endif