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
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
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.
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.
32 #ifndef _LINUX_COMPILER_H_
33 #define _LINUX_COMPILER_H_
35 #include <sys/cdefs.h>
43 #define __chk_user_ptr(x) ((void)0)
44 #define __chk_io_ptr(x) ((void)0)
45 #define __builtin_warning(x, y...) (1)
48 #define __acquire(x) do { } while (0)
49 #define __release(x) do { } while (0)
50 #define __cond_lock(x,c) (c)
61 #define __weak __weak_symbol
63 #define ___stringify(...) #__VA_ARGS__
64 #define __stringify(...) ___stringify(__VA_ARGS__)
65 #define __attribute_const__ __attribute__((__const__))
66 #undef __always_inline
67 #define __always_inline inline
68 #define noinline __noinline
69 #define ____cacheline_aligned __aligned(CACHE_LINE_SIZE)
71 #define likely(x) __builtin_expect(!!(x), 1)
72 #define unlikely(x) __builtin_expect(!!(x), 0)
73 #define typeof(x) __typeof(x)
75 #define uninitialized_var(x) x = x
76 #define __maybe_unused __unused
77 #define __always_unused __unused
78 #define __must_check __result_use_check
80 #define __printf(a,b) __printflike(a,b)
82 #define barrier() __asm__ __volatile__("": : :"memory")
84 #define ___PASTE(a,b) a##b
85 #define __PASTE(a,b) ___PASTE(a,b)
87 #define ACCESS_ONCE(x) (*(volatile __typeof(x) *)&(x))
89 #define WRITE_ONCE(x,v) do { \
91 ACCESS_ONCE(x) = (v); \
95 #define READ_ONCE(x) ({ \
96 __typeof(x) __var = ({ \
104 #define lockless_dereference(p) READ_ONCE(p)
106 #define _AT(T,X) ((T)(X))
108 #endif /* _LINUX_COMPILER_H_ */