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- #ifndef __LINUX_COMPILER_H
- #define __LINUX_COMPILER_H
-
- #ifndef __ASSEMBLY__
-
- #ifdef __CHECKER__
- # define __user __attribute__((noderef, address_space(1)))
- # define __kernel /* default address space */
- # define __safe __attribute__((safe))
- # define __force __attribute__((force))
- # define __iomem __attribute__((noderef, address_space(2)))
- # define __acquires(x) __attribute__((context(0,1)))
- # define __releases(x) __attribute__((context(1,0)))
- # define __acquire(x) __context__(1)
- # define __release(x) __context__(-1)
- # define __cond_lock(x) ((x) ? ({ __context__(1); 1; }) : 0)
- extern void __chk_user_ptr(void __user *);
- extern void __chk_io_ptr(void __iomem *);
- #else
- # define __user
- # define __kernel
- # define __safe
- # define __force
- # define __iomem
- # define __chk_user_ptr(x) (void)0
- # define __chk_io_ptr(x) (void)0
- # define __builtin_warning(x, y...) (1)
- # define __acquires(x)
- # define __releases(x)
- # define __acquire(x) (void)0
- # define __release(x) (void)0
- # define __cond_lock(x) (x)
- #endif
-
- #if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
- #define inline __inline__
- #define __inline__ __inline__
- #define __inline __inline__
- #ifndef asm
- # define asm __asm__
- #endif
- #ifndef volatile
- # define volatile __volatile__
- #endif
- #endif
-
- #ifdef __KERNEL__
- #if __GNUC__ > 3
- # include <linux/compiler-gcc+.h> /* catch-all for GCC 4, 5, etc. */
- #elif __GNUC__ == 3
- # include <linux/compiler-gcc3.h>
- #elif __GNUC__ == 2
- # include <linux/compiler-gcc2.h>
- #else
- # error Sorry, your compiler is too old/not recognized.
- #endif
- #endif
-
- /* Intel compiler defines __GNUC__. So we will overwrite implementations
- * coming from above header files here
- */
- #ifdef __INTEL_COMPILER
- # include <linux/compiler-intel.h>
- #endif
-
- /*
- * Generic compiler-dependent macros required for kernel
- * build go below this comment. Actual compiler/compiler version
- * specific implementations come from the above header files
- */
-
- #define likely(x) __builtin_expect(!!(x), 1)
- #define unlikely(x) __builtin_expect(!!(x), 0)
-
- /* Optimization barrier */
- #ifndef barrier
- # ifdef mb
- # define barrier() mb()
- # else
- # define barrier() __asm__ __volatile__ ("" : : : "memory")
- # endif
- #endif
-
- #ifndef RELOC_HIDE
- # define RELOC_HIDE(ptr, off) \
- ({ unsigned long __ptr; \
- __ptr = (unsigned long) (ptr); \
- (typeof(ptr)) (__ptr + (off)); })
- #endif
-
- #endif /* __ASSEMBLY__ */
-
- /*
- * Allow us to mark functions as 'deprecated' and have gcc emit a nice
- * warning for each use, in hopes of speeding the functions removal.
- * Usage is:
- * int __deprecated foo(void)
- */
- #ifndef __deprecated
- # define __deprecated /* unimplemented */
- #endif
-
- #ifndef __must_check
- #define __must_check
- #endif
-
- /*
- * Allow us to avoid 'defined but not used' warnings on functions and data,
- * as well as force them to be emitted to the assembly file.
- *
- * As of gcc 3.3, static functions that are not marked with attribute((used))
- * may be elided from the assembly file. As of gcc 3.3, static data not so
- * marked will not be elided, but this may change in a future gcc version.
- *
- * In prior versions of gcc, such functions and data would be emitted, but
- * would be warned about except with attribute((unused)).
- */
- #ifndef __attribute_used__
- # define __attribute_used__ /* unimplemented */
- #endif
-
- /*
- * From the GCC manual:
- *
- * Many functions have no effects except the return value and their
- * return value depends only on the parameters and/or global
- * variables. Such a function can be subject to common subexpression
- * elimination and loop optimization just as an arithmetic operator
- * would be.
- * [...]
- */
- #ifndef __attribute_pure__
- # define __attribute_pure__ /* unimplemented */
- #endif
-
- /*
- * From the GCC manual:
- *
- * Many functions do not examine any values except their arguments,
- * and have no effects except the return value. Basically this is
- * just slightly more strict class than the `pure' attribute above,
- * since function is not allowed to read global memory.
- *
- * Note that a function that has pointer arguments and examines the
- * data pointed to must _not_ be declared `const'. Likewise, a
- * function that calls a non-`const' function usually must not be
- * `const'. It does not make sense for a `const' function to return
- * `void'.
- */
- #ifndef __attribute_const__
- # define __attribute_const__ /* unimplemented */
- #endif
-
- #ifndef __always_inline
- #define __always_inline inline
- #endif
-
- #ifdef __cplusplus
- #define __cast__(_to) (_to)
- #else
- #define __cast__(_to)
- #endif
-
- #endif /* __LINUX_COMPILER_H */
-