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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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57
include/linux/compiler-gcc.h
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@@ -5,6 +5,9 @@
/*
* Common definitions for all gcc versions go here.
*/
#define GCC_VERSION (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
/* Optimization barrier */
@@ -34,9 +37,15 @@
__asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
(typeof(ptr)) (__ptr + (off)); })
/* Make the optimizer believe the variable can be manipulated arbitrarily. */
#define OPTIMIZER_HIDE_VAR(var) __asm__ ("" : "=r" (var) : "0" (var))
#ifdef __CHECKER__
#define __must_be_array(arr) 0
#else
/* &a[0] degrades to a pointer: a different type from an array */
#define __must_be_array(a) \
BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
#endif
/*
* Force always-inline if the user requests it so via the .config,
@@ -44,15 +53,18 @@
*/
#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
!defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
# define inline inline __attribute__((always_inline))
# define __inline__ __inline__ __attribute__((always_inline))
# define __inline __inline __attribute__((always_inline))
# define inline inline __attribute__((always_inline)) notrace
# define __inline__ __inline__ __attribute__((always_inline)) notrace
# define __inline __inline __attribute__((always_inline)) notrace
#else
/* A lot of inline functions can cause havoc with function tracing */
# define inline inline notrace
# define __inline__ __inline__ notrace
# define __inline __inline notrace
#endif
#define __deprecated __attribute__((deprecated))
#ifndef __packed
# define __packed __attribute__((packed))
#endif
#define __packed __attribute__((packed))
#define __weak __attribute__((weak))
/*
@@ -60,8 +72,12 @@
* naked functions because then mcount is called without stack and frame pointer
* being set up and there is no chance to restore the lr register to the value
* before mcount was called.
*
* The asm() bodies of naked functions often depend on standard calling conventions,
* therefore they must be noinline and noclone. GCC 4.[56] currently fail to enforce
* this, so we must do so ourselves. See GCC PR44290.
*/
#define __naked __attribute__((naked)) notrace
#define __naked __attribute__((naked)) noinline __noclone notrace
#define __noreturn __attribute__((noreturn))
@@ -75,13 +91,10 @@
* would be.
* [...]
*/
#ifndef __pure
# define __pure __attribute__((pure))
#endif
#ifndef __aligned
# define __aligned(x) __attribute__((aligned(x)))
#endif
#define __printf(a,b) __attribute__((format(printf,a,b)))
#define __pure __attribute__((pure))
#define __aligned(x) __attribute__((aligned(x)))
#define __printf(a, b) __attribute__((format(printf, a, b)))
#define __scanf(a, b) __attribute__((format(scanf, a, b)))
#define noinline __attribute__((noinline))
#define __attribute_const__ __attribute__((__const__))
#define __maybe_unused __attribute__((unused))
@@ -91,3 +104,15 @@
#define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h)
#define gcc_header(x) _gcc_header(x)
#include gcc_header(__GNUC__)
#if !defined(__noclone)
#define __noclone /* not needed */
#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))