compiler.h

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    1 /*-
    2  * Copyright (c) 2010 Isilon Systems, Inc.
    3  * Copyright (c) 2010 iX Systems, Inc.
    4  * Copyright (c) 2010 Panasas, Inc.
    5  * Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
    6  * Copyright (c) 2015 François Tigeot
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice unmodified, this list of conditions, and the following
   14  *    disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 #ifndef _LINUXKPI_LINUX_COMPILER_H_
   33 #define _LINUXKPI_LINUX_COMPILER_H_
   34 
   35 #include <sys/cdefs.h>
   36 
   37 #define __user
   38 #define __kernel
   39 #define __safe
   40 #define __force
   41 #define __nocast
   42 #define __iomem
   43 #define __chk_user_ptr(x)               ((void)0)
   44 #define __chk_io_ptr(x)                 ((void)0)
   45 #define __builtin_warning(x, y...)      (1)
   46 #define __acquires(x)
   47 #define __releases(x)
   48 #define __acquire(x)                    do { } while (0)
   49 #define __release(x)                    do { } while (0)
   50 #define __cond_lock(x,c)                (c)
   51 #define __bitwise
   52 #define __devinitdata
   53 #define __deprecated
   54 #define __init
   55 #define __initconst
   56 #define __devinit
   57 #define __devexit
   58 #define __exit
   59 #define __rcu
   60 #define __percpu
   61 #define __weak __weak_symbol
   62 #define __malloc
   63 #define __attribute_const__             __attribute__((__const__))
   64 #undef __always_inline
   65 #define __always_inline                 inline
   66 #define noinline                        __noinline
   67 #define ____cacheline_aligned           __aligned(CACHE_LINE_SIZE)
   68 #define ____cacheline_aligned_in_smp    __aligned(CACHE_LINE_SIZE)
   69 #define fallthrough                     /* FALLTHROUGH */ do { } while(0)
   70 
   71 #define likely(x)                       __builtin_expect(!!(x), 1)
   72 #define unlikely(x)                     __builtin_expect(!!(x), 0)
   73 #define typeof(x)                       __typeof(x)
   74 
   75 #define uninitialized_var(x)            x = x
   76 #define __maybe_unused                  __unused
   77 #define __always_unused                 __unused
   78 #define __must_check                    __result_use_check
   79 
   80 #define __printf(a,b)                   __printflike(a,b)
   81 
   82 #define barrier()                       __asm__ __volatile__("": : :"memory")
   83 
   84 #define lower_32_bits(n)                ((u32)(n))
   85 #define upper_32_bits(n)                ((u32)(((n) >> 16) >> 16))
   86 
   87 #define ___PASTE(a,b) a##b
   88 #define __PASTE(a,b) ___PASTE(a,b)
   89 
   90 #define ACCESS_ONCE(x)                  (*(volatile __typeof(x) *)&(x))
   91 
   92 #define WRITE_ONCE(x,v) do {            \
   93         barrier();                      \
   94         ACCESS_ONCE(x) = (v);           \
   95         barrier();                      \
   96 } while (0)
   97 
   98 #define READ_ONCE(x) ({                 \
   99         __typeof(x) __var = ({          \
  100                 barrier();              \
  101                 ACCESS_ONCE(x);         \
  102         });                             \
  103         barrier();                      \
  104         __var;                          \
  105 })
  106 
  107 #define lockless_dereference(p) READ_ONCE(p)
  108 
  109 #define _AT(T,X)        ((T)(X))
  110 
  111 #define __same_type(a, b)       __builtin_types_compatible_p(typeof(a), typeof(b))
  112 #define __must_be_array(a)      __same_type(a, &(a)[0])
  113 
  114 #define sizeof_field(_s, _m)    sizeof(((_s *)0)->_m)
  115 
  116 #endif  /* _LINUXKPI_LINUX_COMPILER_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/compiler.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/compiler.h