2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2015 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) 0
44 #define __chk_io_ptr(x) 0
45 #define __builtin_warning(x, y...) (1)
48 #define __acquire(x) 0
49 #define __release(x) 0
50 #define __cond_lock(x,c) (c)
57 #define __stringify(x) #x
58 #define __attribute_const__ __attribute__((__const__))
59 #undef __always_inline
60 #define __always_inline inline
62 #define likely(x) __builtin_expect(!!(x), 1)
63 #define unlikely(x) __builtin_expect(!!(x), 0)
64 #define typeof(x) __typeof(x)
66 #define uninitialized_var(x) x = x
67 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
68 #define __always_unused __unused
69 #define __must_check __result_use_check
71 #define __printf(a,b) __printflike(a,b)
73 #define barrier() __asm__ __volatile__("": : :"memory")
75 #define ACCESS_ONCE(x) (*(volatile __typeof(x) *)&(x))
77 #define WRITE_ONCE(x,v) do { \
79 ACCESS_ONCE(x) = (v); \
83 #define READ_ONCE(x) ({ \
86 __var = ACCESS_ONCE(x); \
91 #endif /* _LINUX_COMPILER_H_ */