1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2014 François Tigeot 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef _LINUX_KERNEL_H_ 30 #define _LINUX_KERNEL_H_ 31 32 #include <sys/systm.h> 33 #include <sys/param.h> 34 #include <sys/libkern.h> 35 #include <sys/stat.h> 36 37 #include <linux/bitops.h> 38 #include <linux/compiler.h> 39 #include <linux/types.h> 40 41 #define KERN_CONT "" 42 #define KERN_EMERG "<0>" 43 #define KERN_ALERT "<1>" 44 #define KERN_CRIT "<2>" 45 #define KERN_ERR "<3>" 46 #define KERN_WARNING "<4>" 47 #define KERN_NOTICE "<5>" 48 #define KERN_INFO "<6>" 49 #define KERN_DEBUG "<7>" 50 51 #define BUG() do \ 52 { \ 53 panic("BUG in %s at %s:%u", \ 54 __func__, __FILE__, __LINE__); \ 55 } while (0) 56 57 #define BUG_ON(condition) do { if (condition) BUG(); } while(0) 58 59 #define _WARN_STR(x) #x 60 61 #define WARN_ON(condition) ({ \ 62 int __ret = !!(condition); \ 63 if (__ret) \ 64 kprintf("WARNING %s failed at %s:%d\n", \ 65 _WARN_STR(condition), __FILE__, __LINE__); \ 66 unlikely(__ret); \ 67 }) 68 69 #define WARN_ON_ONCE(condition) ({ \ 70 static int __warned; \ 71 int __ret = !!(condition); \ 72 if (__ret && !__warned) { \ 73 kprintf("WARNING %s failed at %s:%d\n", \ 74 _WARN_STR(condition), __FILE__, __LINE__); \ 75 __warned = 1; \ 76 } \ 77 unlikely(__ret); \ 78 }) 79 80 #undef ALIGN 81 #define ALIGN(x, y) roundup2((x), (y)) 82 #define DIV_ROUND_UP howmany 83 84 #define printk(X...) kprintf(X) 85 #define pr_debug(fmt, ...) printk(KERN_DEBUG # fmt, ##__VA_ARGS__) 86 #define udelay(t) DELAY(t) 87 88 #ifndef pr_fmt 89 #define pr_fmt(fmt) fmt 90 #endif 91 92 /* 93 * Print a one-time message (analogous to WARN_ONCE() et al): 94 */ 95 #define printk_once(x...) ({ \ 96 static bool __print_once; \ 97 \ 98 if (!__print_once) { \ 99 __print_once = true; \ 100 printk(x); \ 101 } \ 102 }) 103 104 105 106 #define pr_emerg(fmt, ...) \ 107 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) 108 #define pr_alert(fmt, ...) \ 109 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) 110 #define pr_crit(fmt, ...) \ 111 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) 112 #define pr_err(fmt, ...) \ 113 kprintf(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) 114 #define pr_warning(fmt, ...) \ 115 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) 116 #define pr_warn pr_warning 117 #define pr_notice(fmt, ...) \ 118 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) 119 #define pr_info(fmt, ...) \ 120 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) 121 #define pr_cont(fmt, ...) \ 122 printk(KERN_CONT fmt, ##__VA_ARGS__) 123 124 /* pr_devel() should produce zero code unless DEBUG is defined */ 125 #ifdef DEBUG 126 #define pr_devel(fmt, ...) \ 127 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 128 #else 129 #define pr_devel(fmt, ...) \ 130 ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; }) 131 #endif 132 133 #ifndef WARN 134 #define WARN(condition, format...) ({ \ 135 int __ret_warn_on = !!(condition); \ 136 if (unlikely(__ret_warn_on)) \ 137 pr_warning(format); \ 138 unlikely(__ret_warn_on); \ 139 }) 140 #endif 141 142 #define WARN_ONCE(condition, format...) ({ \ 143 static bool __warned_once; \ 144 \ 145 if ((condition) && !__warned_once) { \ 146 WARN(condition, format); \ 147 __warned_once = true; \ 148 } \ 149 }) 150 151 #define container_of(ptr, type, member) \ 152 ({ \ 153 __typeof(((type *)0)->member) *_p = (ptr); \ 154 (type *)((char *)_p - offsetof(type, member)); \ 155 }) 156 157 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 158 159 #define simple_strtoul strtoul 160 #define simple_strtol strtol 161 162 #define min(x, y) (x < y ? x : y) 163 #define max(x, y) (x > y ? x : y) 164 #define min_t(type, _x, _y) (type)(_x) < (type)(_y) ? (type)(_x) : (_y) 165 #define max_t(type, _x, _y) (type)(_x) > (type)(_y) ? (type)(_x) : (_y) 166 167 /* 168 * This looks more complex than it should be. But we need to 169 * get the type for the ~ right in round_down (it needs to be 170 * as wide as the result!), and we want to evaluate the macro 171 * arguments just once each. 172 */ 173 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 174 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 175 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 176 177 #define num_possible_cpus() mp_ncpus 178 179 typedef struct pm_message { 180 int event; 181 } pm_message_t; 182 183 /* Swap values of a and b */ 184 #define swap(a, b) \ 185 ({ \ 186 typeof(a) _swap_tmp = a; \ 187 a = b; \ 188 b = _swap_tmp; \ 189 }) 190 191 #endif /* _LINUX_KERNEL_H_ */ 192