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compiler*.h: sync include/linux/compiler*.h with Linux 3.16

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Copy them from Linux v3.16 tag.
My main motivation of this commit is to add compiler-clang.h.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
This commit is contained in:
Masahiro Yamada
2014-09-04 02:40:58 +09:00
committed by Tom Rini
parent e6ca1ad604
commit fb8ffd7cfc
6 changed files with 236 additions and 44 deletions
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20
include/linux/compiler-gcc3.h
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@@ -2,20 +2,22 @@
#error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
#endif
#if __GNUC_MINOR__ >= 3
#if GCC_VERSION < 30200
# error Sorry, your compiler is too old - please upgrade it.
#endif
#if GCC_VERSION >= 30300
# define __used __attribute__((__used__))
#else
# define __used __attribute__((__unused__))
#endif
#if __GNUC_MINOR__ >= 4
#if GCC_VERSION >= 30400
#define __must_check __attribute__((warn_unused_result))
#endif
/*
* A trick to suppress uninitialized variable warning without generating any
* code
*/
#define uninitialized_var(x) x = x
#define __always_inline inline __attribute__((always_inline))
#ifdef CONFIG_GCOV_KERNEL
# if GCC_VERSION < 30400
# error "GCOV profiling support for gcc versions below 3.4 not included"
# endif /* __GNUC_MINOR__ */
#endif /* CONFIG_GCOV_KERNEL */