1 From ba619c7ec7820e80d1b5b520440fdb81c31c0baf Mon Sep 17 00:00:00 2001
2 From: Ronan Le Martret <ronan.lemartret@iot.bzh>
3 Date: Fri, 14 Oct 2016 09:03:11 +0200
4 Subject: [PATCH] fix gcc6 build
6 Signed-off-by: ronan <ronan@linux-pgnz.suse>
8 include/linux/compiler-gcc6.h | 66 +++++++++++++++++++++++++++++++++++++++++++
9 1 file changed, 66 insertions(+)
10 create mode 100644 include/linux/compiler-gcc6.h
12 diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h
14 index 0000000..a3d00d8
16 +++ b/include/linux/compiler-gcc6.h
18 +#ifndef __LINUX_COMPILER_H
19 +#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
22 +#define __used __attribute__((__used__))
23 +#define __must_check __attribute__((warn_unused_result))
24 +#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
26 +/* Mark functions as cold. gcc will assume any path leading to a call
27 + to them will be unlikely. This means a lot of manual unlikely()s
28 + are unnecessary now for any paths leading to the usual suspects
29 + like BUG(), printk(), panic() etc. [but let's keep them for now for
32 + Early snapshots of gcc 4.3 don't support this and we can't detect this
33 + in the preprocessor, but we can live with this because they're unreleased.
34 + Maketime probing would be overkill here.
36 + gcc also has a __attribute__((__hot__)) to move hot functions into
37 + a special section, but I don't see any sense in this right now in
38 + the kernel context */
39 +#define __cold __attribute__((__cold__))
41 +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
44 +# define __compiletime_warning(message) __attribute__((warning(message)))
45 +# define __compiletime_error(message) __attribute__((error(message)))
46 +#endif /* __CHECKER__ */
49 + * Mark a position in code as unreachable. This can be used to
50 + * suppress control flow warnings after asm blocks that transfer
51 + * control elsewhere.
53 + * Early snapshots of gcc 4.5 don't support this and we can't detect
54 + * this in the preprocessor, but we can live with this because they're
55 + * unreleased. Really, we need to have autoconf for the kernel.
57 +#define unreachable() __builtin_unreachable()
59 +/* Mark a function definition as prohibited from being cloned. */
60 +#define __noclone __attribute__((__noclone__))
63 + * Tell the optimizer that something else uses this function or variable.
65 +#define __visible __attribute__((externally_visible))
68 + * GCC 'asm goto' miscompiles certain code sequences:
70 + * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
72 + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
73 + * Fixed in GCC 4.8.2 and later versions.
75 + * (asm goto is automatically volatile - the naming reflects this.)
77 +#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
79 +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
80 +#define __HAVE_BUILTIN_BSWAP32__
81 +#define __HAVE_BUILTIN_BSWAP64__
82 +#define __HAVE_BUILTIN_BSWAP16__
83 +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */