package/boot/uboot-imx6/patches/103-Add-linux-compiler-gcc5.h-to-fix-builds-with-gcc5.patch

   1 From 478b02f1a7043b673565075ea5016376f3293b23 Mon Sep 17 00:00:00 2001
   2 From: Hans de Goede <hdegoede@redhat.com>
   3 Date: Sat, 7 Feb 2015 22:52:40 +0100
   4 Subject: Add linux/compiler-gcc5.h to fix builds with gcc5
   5
   6 Add linux/compiler-gcc5/h from the kernel sources at:
   7
   8 commit 5631b8fba640a4ab2f8a954f63a603fa34eda96b
   9 Author: Steven Noonan <steven@uplinklabs.net>
  10 Date:   Sat Oct 25 15:09:42 2014 -0700
  11
  12     compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles
  13
  14 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  15 ---
  16  include/linux/compiler-gcc5.h | 65 +++++++++++++++++++++++++++++++++++++++++++
  17  1 file changed, 65 insertions(+)
  18  create mode 100644 include/linux/compiler-gcc5.h
  19
  20 --- /dev/null
  21 +++ b/include/linux/compiler-gcc5.h
  22 @@ -0,0 +1,65 @@
  23 +#ifndef __LINUX_COMPILER_H
  24 +#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
  25 +#endif
  26 +
  27 +#define __used                         __attribute__((__used__))
  28 +#define __must_check                   __attribute__((warn_unused_result))
  29 +#define __compiler_offsetof(a, b)      __builtin_offsetof(a, b)
  30 +
  31 +/* Mark functions as cold. gcc will assume any path leading to a call
  32 +   to them will be unlikely.  This means a lot of manual unlikely()s
  33 +   are unnecessary now for any paths leading to the usual suspects
  34 +   like BUG(), printk(), panic() etc. [but let's keep them for now for
  35 +   older compilers]
  36 +
  37 +   Early snapshots of gcc 4.3 don't support this and we can't detect this
  38 +   in the preprocessor, but we can live with this because they're unreleased.
  39 +   Maketime probing would be overkill here.
  40 +
  41 +   gcc also has a __attribute__((__hot__)) to move hot functions into
  42 +   a special section, but I don't see any sense in this right now in
  43 +   the kernel context */
  44 +#define __cold                 __attribute__((__cold__))
  45 +
  46 +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
  47 +
  48 +#ifndef __CHECKER__
  49 +# define __compiletime_warning(message) __attribute__((warning(message)))
  50 +# define __compiletime_error(message) __attribute__((error(message)))
  51 +#endif /* __CHECKER__ */
  52 +
  53 +/*
  54 + * Mark a position in code as unreachable.  This can be used to
  55 + * suppress control flow warnings after asm blocks that transfer
  56 + * control elsewhere.
  57 + *
  58 + * Early snapshots of gcc 4.5 don't support this and we can't detect
  59 + * this in the preprocessor, but we can live with this because they're
  60 + * unreleased.  Really, we need to have autoconf for the kernel.
  61 + */
  62 +#define unreachable() __builtin_unreachable()
  63 +
  64 +/* Mark a function definition as prohibited from being cloned. */
  65 +#define __noclone      __attribute__((__noclone__))
  66 +
  67 +/*
  68 + * Tell the optimizer that something else uses this function or variable.
  69 + */
  70 +#define __visible __attribute__((externally_visible))
  71 +
  72 +/*
  73 + * GCC 'asm goto' miscompiles certain code sequences:
  74 + *
  75 + *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  76 + *
  77 + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
  78 + *
  79 + * (asm goto is automatically volatile - the naming reflects this.)
  80 + */
  81 +#define asm_volatile_goto(x...)        do { asm goto(x); asm (""); } while (0)
  82 +
  83 +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
  84 +#define __HAVE_BUILTIN_BSWAP32__
  85 +#define __HAVE_BUILTIN_BSWAP64__
  86 +#define __HAVE_BUILTIN_BSWAP16__
  87 +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */