board/roseapplepi/patches/linux/0002-kernel-add-support-for-gcc-5.patch

   1 From 96b4fb75d15be65edc5494579e4a944534042f99 Mon Sep 17 00:00:00 2001
   2 From: Sasha Levin <sasha.levin@oracle.com>
   3 Date: Mon, 13 Oct 2014 15:51:05 -0700
   4 Subject: [PATCH] kernel: add support for gcc 5
   5
   6 We're missing include/linux/compiler-gcc5.h which is required now
   7 because gcc branched off to v5 in trunk.
   8
   9 Just copy the relevant bits out of include/linux/compiler-gcc4.h,
  10 no new code is added as of now.
  11
  12 This fixes a build error when using gcc 5.
  13
  14 Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
  15 Cc: <stable@vger.kernel.org>
  16 Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
  17 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  18 (cherry picked from commit 71458cfc782eafe4b27656e078d379a34e472adf)
  19 Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
  20 ---
  21  include/linux/compiler-gcc5.h | 66 +++++++++++++++++++++++++++++++++++++++++++
  22  1 file changed, 66 insertions(+)
  23  create mode 100644 include/linux/compiler-gcc5.h
  24
  25 diff --git a/include/linux/compiler-gcc5.h b/include/linux/compiler-gcc5.h
  26 new file mode 100644
  27 index 0000000..cdd1cc2
  28 --- /dev/null
  29 +++ b/include/linux/compiler-gcc5.h
  30 @@ -0,0 +1,66 @@
  31 +#ifndef __LINUX_COMPILER_H
  32 +#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
  33 +#endif
  34 +
  35 +#define __used                         __attribute__((__used__))
  36 +#define __must_check                   __attribute__((warn_unused_result))
  37 +#define __compiler_offsetof(a, b)      __builtin_offsetof(a, b)
  38 +
  39 +/* Mark functions as cold. gcc will assume any path leading to a call
  40 +   to them will be unlikely.  This means a lot of manual unlikely()s
  41 +   are unnecessary now for any paths leading to the usual suspects
  42 +   like BUG(), printk(), panic() etc. [but let's keep them for now for
  43 +   older compilers]
  44 +
  45 +   Early snapshots of gcc 4.3 don't support this and we can't detect this
  46 +   in the preprocessor, but we can live with this because they're unreleased.
  47 +   Maketime probing would be overkill here.
  48 +
  49 +   gcc also has a __attribute__((__hot__)) to move hot functions into
  50 +   a special section, but I don't see any sense in this right now in
  51 +   the kernel context */
  52 +#define __cold                 __attribute__((__cold__))
  53 +
  54 +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
  55 +
  56 +#ifndef __CHECKER__
  57 +# define __compiletime_warning(message) __attribute__((warning(message)))
  58 +# define __compiletime_error(message) __attribute__((error(message)))
  59 +#endif /* __CHECKER__ */
  60 +
  61 +/*
  62 + * Mark a position in code as unreachable.  This can be used to
  63 + * suppress control flow warnings after asm blocks that transfer
  64 + * control elsewhere.
  65 + *
  66 + * Early snapshots of gcc 4.5 don't support this and we can't detect
  67 + * this in the preprocessor, but we can live with this because they're
  68 + * unreleased.  Really, we need to have autoconf for the kernel.
  69 + */
  70 +#define unreachable() __builtin_unreachable()
  71 +
  72 +/* Mark a function definition as prohibited from being cloned. */
  73 +#define __noclone      __attribute__((__noclone__))
  74 +
  75 +/*
  76 + * Tell the optimizer that something else uses this function or variable.
  77 + */
  78 +#define __visible __attribute__((externally_visible))
  79 +
  80 +/*
  81 + * GCC 'asm goto' miscompiles certain code sequences:
  82 + *
  83 + *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  84 + *
  85 + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
  86 + * Fixed in GCC 4.8.2 and later versions.
  87 + *
  88 + * (asm goto is automatically volatile - the naming reflects this.)
  89 + */
  90 +#define asm_volatile_goto(x...)        do { asm goto(x); asm (""); } while (0)
  91 +
  92 +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
  93 +#define __HAVE_BUILTIN_BSWAP32__
  94 +#define __HAVE_BUILTIN_BSWAP64__
  95 +#define __HAVE_BUILTIN_BSWAP16__
  96 +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
  97 --
  98 2.10.2
  99