[hurd] 01/02: Fix build with gcc 7

[Samuel Thibault]

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sthibault pushed a commit to branch dde-upstream
in repository hurd.

commit 5018bd32c87250ed3fd4249d050b772750827db0
Author: Samuel Thibault <address@hidden>
Date:   Mon Aug 28 02:01:39 2017 +0200

    Fix build with gcc 7
    
    * libdde_linux26/contrib/include/linux/compiler-gcc7.h: New
    file, copy of compiler-gcc6.h.
---
 .../contrib/include/linux/compiler-gcc7.h          | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/libdde_linux26/contrib/include/linux/compiler-gcc7.h 
b/libdde_linux26/contrib/include/linux/compiler-gcc7.h
new file mode 100644
index 0000000..125834e
--- /dev/null
+++ b/libdde_linux26/contrib/include/linux/compiler-gcc7.h
@@ -0,0 +1,25 @@
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc7.h> directly, include 
<linux/compiler.h> instead."
+#endif
+
+#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))
+
+/*
+ * A trick to suppress uninitialized variable warning without generating any
+ * code
+ */
+#define uninitialized_var(x) x = x
+
+/* Mark functions as cold. gcc will assume any path leading to a call
+   to them will be unlikely.  This means a lot of manual unlikely()s
+   are unnecessary now for any paths leading to the usual suspects
+   like BUG(), printk(), panic() etc. [but let's keep them for now for
+   older compilers]
+
+   gcc also has a __attribute__((__hot__)) to move hot functions into
+   a special section, but I don't see any sense in this right now in
+   the kernel context */
+#define __cold                 __attribute__((__cold__))

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