X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=compiler%2Fcompiler.h;h=e1afcb424b8efa06380311cd1e865df3fb6f0d64;hb=4d53d6c06e181d8e4eb62dd8c1ba471dee9f35e2;hp=c1923ddd8e6019025d631f6d2ba4a648e7c8a469;hpb=3b2e1464ae58caf42c74ab4bdeaa5eae7c38a23f;p=fio.git

diff --git a/compiler/compiler.h b/compiler/compiler.h
index c1923ddd..e1afcb42 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -13,10 +13,24 @@
 #define __must_check
 #endif
 
-#define uninitialized_var(x) x = x
+/*
+ * Mark unused variables passed to ops functions as unused, to silence gcc
+ */
+#define fio_unused	__attribute__((__unused__))
+#define fio_init	__attribute__((constructor))
+#define fio_exit	__attribute__((destructor))
 
-#ifndef __weak
-#define __weak	__attribute__((weak))
-#endif
+#define fio_unlikely(x)	__builtin_expect(!!(x), 0)
+
+/*
+ * Check at compile time that something is of a particular type.
+ * Always evaluates to 1 so you may use it easily in comparisons.
+ */
+#define typecheck(type,x) \
+({	type __dummy; \
+	typeof(x) __dummy2; \
+	(void)(&__dummy == &__dummy2); \
+	1; \
+})
 
 #endif