88 lines
3.2 KiB
Diff
88 lines
3.2 KiB
Diff
From: Hans de Goede <hdegoede@redhat.com>
|
|
Date: Sat, 7 Feb 2015 21:52:40 +0000 (+0100)
|
|
Subject: Add linux/compiler-gcc5.h to fix builds with gcc5
|
|
X-Git-Tag: v2015.04-rc2~31
|
|
X-Git-Url: http://git.denx.de/?p=u-boot.git;a=commitdiff_plain;h=478b02f1a7043b673565075ea5016376f3293b23
|
|
|
|
Add linux/compiler-gcc5.h to fix builds with gcc5
|
|
|
|
Add linux/compiler-gcc5/h from the kernel sources at:
|
|
|
|
commit 5631b8fba640a4ab2f8a954f63a603fa34eda96b
|
|
Author: Steven Noonan <steven@uplinklabs.net>
|
|
Date: Sat Oct 25 15:09:42 2014 -0700
|
|
|
|
compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles
|
|
|
|
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|
|
---
|
|
|
|
--- /dev/null
|
|
+++ b/include/linux/compiler-gcc5.h
|
|
@@ -0,0 +1,65 @@
|
|
+#ifndef __LINUX_COMPILER_H
|
|
+#error "Please don't include <linux/compiler-gcc5.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)
|
|
+
|
|
+/* 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]
|
|
+
|
|
+ Early snapshots of gcc 4.3 don't support this and we can't detect this
|
|
+ in the preprocessor, but we can live with this because they're unreleased.
|
|
+ Maketime probing would be overkill here.
|
|
+
|
|
+ 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__))
|
|
+
|
|
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
|
+
|
|
+#ifndef __CHECKER__
|
|
+# define __compiletime_warning(message) __attribute__((warning(message)))
|
|
+# define __compiletime_error(message) __attribute__((error(message)))
|
|
+#endif /* __CHECKER__ */
|
|
+
|
|
+/*
|
|
+ * Mark a position in code as unreachable. This can be used to
|
|
+ * suppress control flow warnings after asm blocks that transfer
|
|
+ * control elsewhere.
|
|
+ *
|
|
+ * Early snapshots of gcc 4.5 don't support this and we can't detect
|
|
+ * this in the preprocessor, but we can live with this because they're
|
|
+ * unreleased. Really, we need to have autoconf for the kernel.
|
|
+ */
|
|
+#define unreachable() __builtin_unreachable()
|
|
+
|
|
+/* Mark a function definition as prohibited from being cloned. */
|
|
+#define __noclone __attribute__((__noclone__))
|
|
+
|
|
+/*
|
|
+ * Tell the optimizer that something else uses this function or variable.
|
|
+ */
|
|
+#define __visible __attribute__((externally_visible))
|
|
+
|
|
+/*
|
|
+ * GCC 'asm goto' miscompiles certain code sequences:
|
|
+ *
|
|
+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
|
|
+ *
|
|
+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
|
|
+ *
|
|
+ * (asm goto is automatically volatile - the naming reflects this.)
|
|
+ */
|
|
+#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
|
|
+
|
|
+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
|
|
+#define __HAVE_BUILTIN_BSWAP32__
|
|
+#define __HAVE_BUILTIN_BSWAP64__
|
|
+#define __HAVE_BUILTIN_BSWAP16__
|
|
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
|