src/patches/u-boot-support-gcc-6.patch

   1 diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h
   2 new file mode 100644
   3 index 0000000..622117b
   4 --- /dev/null
   5 +++ b/include/linux/compiler-gcc6.h
   6 @@ -0,0 +1,65 @@
   7 +#ifndef __LINUX_COMPILER_H
   8 +#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
   9 +#endif
  10 +
  11 +#define __used                         __attribute__((__used__))
  12 +#define __must_check                   __attribute__((warn_unused_result))
  13 +#define __compiler_offsetof(a, b)      __builtin_offsetof(a, b)
  14 +
  15 +/* Mark functions as cold. gcc will assume any path leading to a call
  16 +   to them will be unlikely.  This means a lot of manual unlikely()s
  17 +   are unnecessary now for any paths leading to the usual suspects
  18 +   like BUG(), printk(), panic() etc. [but let's keep them for now for
  19 +   older compilers]
  20 +
  21 +   Early snapshots of gcc 4.3 don't support this and we can't detect this
  22 +   in the preprocessor, but we can live with this because they're unreleased.
  23 +   Maketime probing would be overkill here.
  24 +
  25 +   gcc also has a __attribute__((__hot__)) to move hot functions into
  26 +   a special section, but I don't see any sense in this right now in
  27 +   the kernel context */
  28 +#define __cold                 __attribute__((__cold__))
  29 +
  30 +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
  31 +
  32 +#ifndef __CHECKER__
  33 +# define __compiletime_warning(message) __attribute__((warning(message)))
  34 +# define __compiletime_error(message) __attribute__((error(message)))
  35 +#endif /* __CHECKER__ */
  36 +
  37 +/*
  38 + * Mark a position in code as unreachable.  This can be used to
  39 + * suppress control flow warnings after asm blocks that transfer
  40 + * control elsewhere.
  41 + *
  42 + * Early snapshots of gcc 4.5 don't support this and we can't detect
  43 + * this in the preprocessor, but we can live with this because they're
  44 + * unreleased.  Really, we need to have autoconf for the kernel.
  45 + */
  46 +#define unreachable() __builtin_unreachable()
  47 +
  48 +/* Mark a function definition as prohibited from being cloned. */
  49 +#define __noclone      __attribute__((__noclone__))
  50 +
  51 +/*
  52 + * Tell the optimizer that something else uses this function or variable.
  53 + */
  54 +#define __visible __attribute__((externally_visible))
  55 +
  56 +/*
  57 + * GCC 'asm goto' miscompiles certain code sequences:
  58 + *
  59 + *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  60 + *
  61 + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
  62 + *
  63 + * (asm goto is automatically volatile - the naming reflects this.)
  64 + */
  65 +#define asm_volatile_goto(x...)        do { asm goto(x); asm (""); } while (0)
  66 +
  67 +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
  68 +#define __HAVE_BUILTIN_BSWAP32__
  69 +#define __HAVE_BUILTIN_BSWAP64__
  70 +#define __HAVE_BUILTIN_BSWAP16__
  71 +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */