1 /* 2 * Copyright (c) 2016 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _ASM_BUG_H_ 28 #define _ASM_BUG_H_ 29 30 #include <sys/param.h> 31 #include <linux/kernel.h> 32 33 #define BUG() do \ 34 { \ 35 panic("BUG in %s at %s:%u", \ 36 __func__, __FILE__, __LINE__); \ 37 } while (0) 38 39 #define BUG_ON(condition) do { if (condition) BUG(); } while(0) 40 41 #define _WARN_STR(x) #x 42 43 #define WARN_ON(condition) ({ \ 44 int __ret = !!(condition); \ 45 if (__ret) \ 46 kprintf("WARNING %s failed at %s:%d\n", \ 47 _WARN_STR(condition), __FILE__, __LINE__); \ 48 unlikely(__ret); \ 49 }) 50 51 #ifndef WARN 52 #define WARN(condition, format...) ({ \ 53 int __ret_warn_on = !!(condition); \ 54 if (unlikely(__ret_warn_on)) \ 55 pr_warning(format); \ 56 unlikely(__ret_warn_on); \ 57 }) 58 #endif 59 60 #define WARN_ON_ONCE(condition) ({ \ 61 static int __warned; \ 62 int __ret = !!(condition); \ 63 if (__ret && !__warned) { \ 64 kprintf("WARNING %s failed at %s:%d\n", \ 65 _WARN_STR(condition), __FILE__, __LINE__); \ 66 __warned = 1; \ 67 } \ 68 unlikely(__ret); \ 69 }) 70 71 #define WARN_ONCE(condition, format...) ({ \ 72 static bool __warned_once; \ 73 int __ret = !!(condition); \ 74 \ 75 if ((condition) && !__warned_once) { \ 76 WARN(condition, format); \ 77 __warned_once = true; \ 78 } \ 79 unlikely(__ret); \ 80 }) 81 82 #define WARN_ON_SMP(condition) WARN_ON(condition) 83 84 #endif /* _ASM_BUG_H_ */ 85