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 _LINUX_COMPILER_H_ 33 #define _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 ___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) 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 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000 85 /* Moved from drm_os_freebsd.h */ 86 #define lower_32_bits(n) ((u32)(n)) 87 #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) 88 #endif 89 90 #define ___PASTE(a,b) a##b 91 #define __PASTE(a,b) ___PASTE(a,b) 92 93 #define ACCESS_ONCE(x) (*(volatile __typeof(x) *)&(x)) 94 95 #define WRITE_ONCE(x,v) do { \ 96 barrier(); \ 97 ACCESS_ONCE(x) = (v); \ 98 barrier(); \ 99 } while (0) 100 101 #define READ_ONCE(x) ({ \ 102 __typeof(x) __var = ({ \ 103 barrier(); \ 104 ACCESS_ONCE(x); \ 105 }); \ 106 barrier(); \ 107 __var; \ 108 }) 109 110 #define lockless_dereference(p) READ_ONCE(p) 111 112 #define _AT(T,X) ((T)(X)) 113 114 #endif /* _LINUX_COMPILER_H_ */ 115